X2

Switched to a GN back in '03 and love it!  I won't go back to a BP.  Currently I only haul one horse and do some trail riding and camping. 

Make sure to check the towing specs/capacity of your '99 F150 before you get too far with this process.  You may not have the capability to handle the weight of a GN.

After buying our LQ trailer we sold our small 5 foot shortwall LQ gooseneck and bought a 2 horse BP for day trips. That lasted a year for me. I like the back tack and the option to store tack, a small plug in fridge in the gooseneck dressing room.  And we are going to add an awning just for day rides when we want to eat lunch and then hit the trail again or somewhere to sit in between show classes. We ended up buying the exact same trailer we had without an LQ installed in it. And what hurts the most is that the shell cost almost as much as my original small LQ trailerr. But hindsight is 20/20.

I prefer goosenecks for ease of hauling, stability and more room in the horse compartment.

mingz, I was going to make the suggestion about hitch extenders and I'm glad you did and glad you are happy with it too. 

I agree with a previous post; that BP and GN trailers have a purpose.  I'm a contractor and have both BP and GN trailers for hauling equipment and materials to jobsites.  As for horse trailer, I prefer GN for all the reasons most of the previous posts stated.  I don't usually do 30 minute short trips with  my horses and I'm not usually hauling to a place that has limited area for parking or turning.  I'm thinking about starting a pony ride business for parties and if I do go that direction, it's going to be a small GN stock trailer.

deranger

We kept our 3 h BP after purchasing a GN with LQ. The smaller BP was more maneuverable and better handling/parking in the local shows we attended. With only a minimal DR, in comparison with the LQ, we soon appreciated the space and amenities the GN provided.

Our last BP had a box length of 18', for us a perfect sized 3 horse trailer. We found a GN with a weekender conversion LQ, that has the same length box. In the same floor space, we are now able to enjoy a private and sanitary bathroom, a comfortable living area with a queen bed, a large storage capacity, and all the appliances we need. Our tack is kept separately in its own area.

With our BP, we jackknifed the rig twice, damaging the trailer front and truck's bumper. Once was when the trailer slid sideways in the deep snow when we were backing, and once with the camper, when backing into a parking spot after dark. With the GN, these problems are alleviated.

Many people  have mentioned that the GN trailers pull better than the BP. I will agree that they behave perfectly in cross winds and when tractor trailers pass. They are consistently rock steady. I will also say that my BP trailers did the same. All my trailers have had torsion type axles, so I can't speak for the spring mounted axles on horse trailers. I consistanly use and have a great deal of knowledge, of the poor effects these springs have on loaded boat trailers.

Having traded one BP for the same size GN, I am very pleased with the extra room and features it offers. I have always had difficulties hooking a BP hitch by myself, where as the GN is a one shot deal, first time, every time.

I haven't noticed any difference in mileage between the two different loaded trailers, even though there is an unloaded weight difference of about 2k#. Our BP had biased ply Goodyears, the GN has new Bridgestone radials which results in less rolling resistance. This difference will sway the mileage results.

After owning three different BP trailers, I do like our two present GN trailers better, if only for the extra room and features. If it came down to purchasing a new BP, I would put the same funds into a used GN instead.

Gard

I had a 2H straightload BP, then went to a 3H GN then a 2H GN and now have a 2H GN with LQ.  I love my GN trailer.  I would not get a straightload though... I think it's easier to haul a safer load with one horse in a slantload.  I hauled my one horse that way for years, usually in the front stall unless I was travelling across the country.  Long distance travel required me to put hay bales, grain, portable corral, buckets, etc in the first stall.  Kind of hard to move that out of the way to unload so horse goes in the back stall when I go long distances.  The only noticable difference was a more stable ride, and a little tighter cornering with the GN...  ie, don't cut your corners too close or you will be jumping curbs haha (don't ask :)  Also gotta be more careful pulling into the gas station!