back when I bought the milltek I thought that alone would give a nice sound, but soon after i wanted a bit more, and now the car sounds about the way I wanted too.. maybe I'll bin the center silencer at some point. Got rid of the CAF yesterday; it sounds better obviously and no power loss I could tell.
I was thinkin' it will draw some hot air without the CAF but after a 50 mile journey popped the hood right after I stopped and the airbox was basically frozen (-3 degrees outside though). Looks loke even without the CAF there is plenty of cold air in that area. will repeat the test in spring and summer.
So, to give an advice: if you have a short caf or no caf at all, keep your filter clean I don't think the BMC will kill performance and, if you like the sound of it:
and have the spare cash I'd say go for it! or a used maxogen as an alternative