I used Redwirez for a whole album, everything was done through a Mesa 4x12 impulse set. The Redwirez are very highly regarded, and sounded much better than anything else I demoed. They really are in a league of their own. Unless you have access to a great cab, a great room, a couple of great mics and pres, and the time and knowledge to set it all up, you will be MUCH better served by just using some good impulses. Unless I'll be working on a very high profile project, I won't use the traditional micing again.