I just sold a fretless model to fund the purchase of a Rockbass Corvette 6 string...
All I can say is that they are great basses and a great bang for your buck. The Warwick hardware and build quality in my opinion is second to none. I love the angled tuners, adjustable nut, bridge, etc... With that model particularly I also really like the separate tone controls for each pickups.
The only thing that may be a concern for you is the single coil hiss of the pickups. They are very clear sounding, which is great in the mix, but when played solo they hiss a decent amount. Had I not sold mine, I would have put Dimarzio Area J's in it.