The spyder Imagine is your best bet for a cheap, simple maintence electro. Look into the 03 imagine, not the 04. The 04 is basically identical performance wise, it just costs about $40 more....

edit:I also recommend buying it from this site.
http://www.actvil.com/is-bin/INTERSH...EAAAD3Et2lA_2r
Paintballgear is the online guru for paintball, you'll get free shipping(normally arrives in 3 days), and will be cheaper than if you went to your local proshop or Walmart/Sport's Authority/Dick's.