There are sooooo many quads out there to look at.. and what price range...
A good size to carry all that... at least a 400... my dad has a 2001 suzuki king quad, I beleive it's a 350 and it carries him, and me and our ice fishing gear, AND pulls a hut like there was nothing on it at all... and I've had it up to the bars in some sticky mud and made it out (but dont' let him know that!)
those Polaris 700's are some really nice quads... I had a Polaris sled, never any major problems with it and I rode that sucker hard.
Honda is known for their reliability... haven't killed one yet (except for my CR) and we've had alot of toys... but suzuki has really been good for us too...
Being younger tho, I would look at a yamaha wolverine, it's what I would personally get, 4x4, in a 350, but it is still a very sporty quad, you can still get some good speed and jumps out of it, but it has the 4x4 wich is nice... just go out and look around and research before you buy.