i would get any of the following over a smarts parts eos
1. used ego8
2. New Etek2/with starframe
3. used dm7
4. used vice
5. used marq
6. new pmr
as far as the other 2, these are my recommendations
ninja tank 68/4500 adjustable tank $155
Ninja Carbon Fiber N2 Tank - 68ci 4500psi at ActionVillage.com : Paintball
Reloader B (on MAJOR SALE HERE for only $50 new)
Empire Reloader B With RIP Drive -Diamond Blue at ADIOM Sports