My RBX775 served me well, i'd consider it a mid-ranged instrument and sounds and looks great. I defretted it this year as I didn't want to part with it but had better fretted basses (Jazz/Stingray). It's likely to be a keeper.. since 2nd hand Yamaha prices are stupidly low.
The BB614 I had i'd GAS'd over for ages, it was a great instrument but like some people say, didn't have that vibe a Fender can have.