+1 on the BBE Opto Stomp that I purchased recently thru the TB Classifieds, informed by reading up on bongomania's site.
The Opto stomp as mentioned in prior responses lends itself towards more subtle/transparent compression unless you turn the compression knob way up, as opposed to adding some sort of pre-EQ'd tone shaping (if that makes sense). I guess the reason it works so well for me is due to the fact that it only has two knobs and a switch, which presents a gentler learning curve for a first time compressor user. I do notice the benefits to using a compressor when slapping right away too. To sum it up, if you're somewhat happy with your tone, the Opto Stomp would rattle the cage less.
The Opto stomp as mentioned in prior responses lends itself towards more subtle/transparent compression unless you turn the compression knob way up, as opposed to adding some sort of pre-EQ'd tone shaping (if that makes sense). I guess the reason it works so well for me is due to the fact that it only has two knobs and a switch, which presents a gentler learning curve for a first time compressor user. I do notice the benefits to using a compressor when slapping right away too. To sum it up, if you're somewhat happy with your tone, the Opto Stomp would rattle the cage less.