Defnitely BCS! Had a milltek, and was average at best, backbox would clang off of everything. BCS doesnt have a big backbox, all the silencing is done up undernath in the center sections.
Going rate for genuine R32 rear ends seems to be anywhere between £230 and £300 depending on condition, i paid around £1100 fo my turboback with sports cat. So by no means cheap, but can always go cat-back if all you want is the looks. Speak to nige from BCS hes a lovely guy and will sort you with exactly what you're after