I'm looking at buying a Warwick Corvette. My only problem is that I don't know how much of a difference there is between the Corvette Standard and the Corvette ProLine. If someone could please explain the differences, and whether or not you feel it's worth an extra $500, I'd be very grateful. Also, I was wondering about pricing on a Corvette $$ Double Buck, and whether or not I should consider that in my purchase of a new bass. Thank you for your time and support.