Here's my deal---I've been playing SWR forever, but my style has changed and my tastes have changed, but my amps haven't. I played an ashdown ABM head and fell in love with the thick, rich sound. I didn't have a lot of highs, just a big meaty sound that I want. I'd love to get the ABM 500 head, but it's $900, which is a lot of cash. Would an RBI preamp get me to the same place for a lot less money? I already have a big power amp, so I got that part covered. I know that the RBI if famous for adding overdrive to the sound, which is not really something I'm looking for in my basic sound. I just want big, round B-15 type sound. I've never been able to play an RBI---I've never seen one in a store.