Well, I've remodelled the Marshall Logo, and whilst its still not perfect, I'm a hell of a lot happier with it now than the previous version...
I pretty much modelled this along the lines of how Philip suggested (except I used manual point placement/polygon creation instead of the pen tool. Also, when extruding the subpatch I applied a little smooth scale to the rear polys to get that expanded look to the text.
Think this is all I'm going to get done tonight since I'm bushed...