I recently picked up a Warwick Corvette $$. Despite the two huge humbuckers (in combination with the black finish it looks pretty f**kin metal

) I'm actually more of a funk/motown/modern jazz player. I stuck on some TI jazz flats like I usually do, but was pretty underwhelmed. The sound seemed to have very little character - all the pickup configurations sounded pretty much the same, it just wasn't exciting. The stainless steel Warwicks that came with it are really awful IMO, so in the absence of anything else I tried some fender stainless flats I had lying around.
I tried these on a fretless before and they really didn't work - too clacky, not very organic sounding at all. But on a fretted bass like this, they're great. I get all the benefits of flats, but the stainless steel and high tension gives a much more modern and exciting sound. That steely high end zing and slap tone is there, but moderated by the fact that they're flats, so it's always tasteful. I've found them to be really versatile: even in music where you'd always think to use roundwounds first, they can do a really good job while retaining all the characteristics that make me prefer flats. Highly recommended, and cheap
john