Do you need other equipment? Mask, tank, hopper, etc? Do you play in the woods or speedball? How much have you played already?
If you haven't played at all, go rent equipment. I really recommend trying something out before you buy it. Check out the buy/sell/trade section on pbnation.com. Try to buy in person so you can test it. Paintballers are usually some of the nicest people you'll meet and they would usually show you how to work the marker if its your first time.
C98 is a good beginner marker. A used Ion (as long as it works) is an okay choice.
Also I think you are confusing PSI with FPS. FPS (feet per second) is the speed at which the ball leaves the barrel. Field rules put it between 230 - 300 usually. PSI is the amount of pressure (in pounds per square inch) on the air that is used to propel the ball. The lower it is the more shots you will get on a tank of C02 or HPA.
Spyders are decent. They tend to require more work, and aren't really worth upgrading all that much. I have an old Spyder Imagine as a backup, and had clone (my buddy also had one and a clone).
If you only have $250 in total, I'd look into buying used, seriously. You should spend at least $60 on a mask. Invest in thermal lenses. They wont fog. Theres no point in having a $200 marker and a $15 mask that fogs up so you can't see. Go to a local store and try some on. Different styles fit different people better. That site has Events on sale for $50-65.
Oh and invest $10 or whatever in some gloves (biking or whatever). You'll thank me when you get shot in the hand and your knuckles aren't all bruised, cut up, and bleeding.
Thats probably more info than you cared for I bet.