Cockers are pretty maintenence free unless you start to tinker- i would say the vision imp if you want a marker for right now, or a cocker if you want a marker for life- they rule, very solid and they go 'clunk glonk' each time they fire. plus the upgradeability and customisation options on a cocker are pretty awesome. Other thing i've noticed is some impulse parts look very delicate, having never owned one i wouldn't like to say whether they are or not.
remember a cocker is for life- not just for christmas!
A.B