hi guys....just wanted you guys/gals $0.02...i've found fairly good deals on both of these basses---about $1700 each, both are used and in great condition, unfortunately, if i bought them, it would be sight unseen...with a return policy, of course--- and i was wondering what you guys thought. i have a thumb neck thru 4 string, and i've played a tobias signature fretless, but i have no experience with the killer b series. they seem pretty solid, but how do they stand up to the thumb 6? anyone?? bueller?