2000 Dodge 2500
, Cummins engine and extended box (which is *amazing* for hauling extra hay, the water tank, and such that won't fit in the trailer, but matched with the extended cab and oversized tires that the previous owner modded it for, makes it fun to park alone, much less with a trailer attached.)
And the trailer is a Sundowner 3-horse slant
with a tack room. I don't recall the specific model, but I absolutely love it -- the ceiling is higher than the norm (I don't recall the exact height, but my high-headed 16hh boy's ears barely brush the ceiling), the dividers are removable (I only have one horse that fits in the 'stalls', and she fell once and got trapped under them, so no more dividers), the bar between the two doors is removable (helpful for cleaning and reluctant horses), there's lights everywhere (in the tack room, in the horse area, and right outside both doors), and there's a collapsible rear tack area. The main tack area was modified by the previous owners -- they put a mattress and curtains up in the gooseneck, and wired the tack room with fluorescent lighting and such, so it has mini living quarters. (It even came with a mini-fridge.
The truck pulls well -- we pull a lot of hills and our driveway alone is nearly vertical, rough dirt/gravel, but she hardly skips a beat. MPG isn't pretty though, and diesel is expensive. And the loud truck (especially when it starts/shuts off) makes some horses nervous.