I have thought about adding the relatively inexpensive BBE dual compressor to my setup, but never got around to it. I guess you use a rack with more spaces than I do, though I've considered putting my power amp alone in a two and then using the four space for preamp and tuner. I could then add wireless and compressor there without either box getting particularly heavy.
The good news, Graeme, is that just about anything you buy to try out can be sold again. If you buy used, you can usually just about break even if it doesn't work for you. Either way, none of the things we're discussing are likely to do irreparable harm to our wallets.
If you're thinking about it and have an opportunity to try it, do it. It will resolve the issue one way or the other and leave you free to ponder other things. Better a little regret now for wasting a few dollars on a failure than a lot of regret ten years down the road when you finally try the SF-2 and find it does wonders for your tone and you could have been using it all along.
-bob
