The main thing putting you off a standard one is the same as the rest of us.
They come at a price (£400+) are made out of mild steel (or kit-kat-wrappers) and are only guaranteed for 12 months.  And you know it will drop off on month 13.:dapprove:
My 172 had a cat and centre pipe replaced under warranty and i managed to get to 45k before needing a new centre and back box.
I went the sensible route and bought stainless for £230. Lifetime guarantee.
Like the guys say, Janspeed = pretty quite for a 182.
Milltek? Nice.....Check out the website they have videos on.