When I went to buy my trailer, I wanted lots and lots of ROOM (i'm much more claustrophobic than my horses, and because of my small stature, I was always elected to lead the horse into the trailer, maneuver under the bar, and climb out of the tiny, tiny, tiny escape door

No fun)
So here's what I bought:
It is a great hauling trailer - it rides very balanced. It has windows and doors everywhere - and everything is moveable - it also has a ramp, which the old guys just love - and I love it too!
It's a 2000 Shoop 2H Deluxe. IMO, Shoop trailers give plenty of room for the horses (as well as any claustrophobic owners!) It has two full size doors - one on each side - and a tack bench in the front (enough to store misc. tack or an english saddle)
PS, we pull it with a 1500 [sub]burban