I've used the BBE BMax in my main rig for around eight years, mostly in rock and metal bands. Works great for me.
Just make sure you take a few minutes to learn how to EQ it correctly, as it uses the common "Fender tone stack" (easy search her on the forums to learn more).
I also agree that the Soundwave distortion pedal would not make an effective preamp.
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Carvin / MarkBass / BBE / Fuzzrocious / Iron Ether