people do run them on here, and with a proper uprev tune up/ecu reflash you should see some gains on them. but on a standard car you'll only really notice more noise.
my personal choice would actually be hi flow cats, they don't need changing out every mot time, and sound better in my opinion. decats tend to sound very raspy at the top end of the rev range, which i personally think sounds very rice. where as a HFC will lower the tone slightly but still offer you the free flow you want, without the rasp.