Everyone, I'm looking for advice on the best amp for under $500 (new or used) that fills no more than two rack spaces (I've got a four-space case, and my Furman PC and BBE 362NR are NOT moving out of it). My early-2000 SWR Bass 350 is OK, but it's a little underagressive and quiet to me and has been rather unreliable of late. I play primarily blues, rock and metal (mostly fingerstyle) and am about to start gigging, and I need something reliable in general and reliably loud. My main bass is a Lakland 55-02 (a Spector ReBop 4 is coming); my cab is an older 4-ohm Genz-Benz 410T-XB2 (can take up to 700 watts). I also make full use of a SABD and Aphex Punch Factory compressor. I'm simply not quite satisfied with the power, projection and volume that I'm getting from the SWR, and am looking to switch. Yes, the pre-amp tubes in it are fairly new, and yes, I've contact-cleaned the knobs and switches. So: lay the suggestions on me! Thanks!