I think some will say I should get the former hands down. Lets look a little more closely though: I'm looking for a good compressor to smooth and tame both guitar and bass signal *before* going into Tech 21BDDI. In the case of the bass, up the signal a bit for more grind, in the case of the guitar, lower the signal for less grind. The comportion has the ability to add some grit (which I always like) possibly to help achieve the 'golden grit' sound of just breaking up : and the compressor gets good reviews (good quality, transparent, assume its same circuit used in bass compactor). And it runs on a battery. Plus has a stomp switch to "kick" into a different tone. The Art can be used for microphones as well and has a real tube (cool) and is highly regarded. It uses a external power unit though (UGGG). Has anyone compared and used both units. I was going to go with the comptortion but I think this is a more practical for my requirements. Thing is, I don;t really use mic's or play live...(yet) this would be for studio use, but in the eventually a jam does occur, having to hook up the art to a power strip is really yucky. Curious: Can it be overdriven (the art)? Any other recommendations in the 50 dollar ebay range?