Heck yea, for a first gun...Tippman is the way to go. Theres a reason most fields use them as the rentals, those suckers are tanks. And as others said, you can get better barrels and stuff for cheap when you get better.
Spyder. Spefically the Xtra. Best semi-auto for it's price IMO. Very easily upgradable :beer:
Your beginning "marker" should be the one you play around and tinker with. Then you move onto the better stuff, maybe even Electronic Markers
Do NOT, I repeat, NOT, get a marker unless you're going to a field VERY often. My rule of thumb for beginners is to go a few times using rental equipment, and if you're absolutely sure you will be somewhat dedicated to this, then get a marker.
And the first piece of equipment you should be getting is a good goggle.