i have a vl maxis e/g. currently in bits in a box due to the reg leaking. they arnt bad markers BUT for the price of them new you'd be better of with a smartparts vibe or proto SLG.
the RG is the mech version. if i were you i'd save my £150 or whatever they cost new (mine was £180) and spend it on an ion/slg (for supair/walkons) or a nice upped tippmann 98/a5 from these forums. (woodland)