My 16valver is quite fast, not really pushed it yet, did 120 in it the ther day tho, and had loads left in it.
The later ones pumps out approx. 160bhp so i am told!!
Mines fast anyways 
If its of any help to you, mine costs me ?420 a year fully comp with tesco's, that with 8 years ncd and me bird on it as a named driver to!
Make sure you check the engine for signs of boy racer abuse tho! Had mine for 4 months now and am very happy with it!!!
Hope this helps
later ones pump out 160bhp?! .. mines one of the last ones really...
it is damn quick... i've been 135 and theres still more go in it.. when its safe i'll max it out.. then i'll be pleased with it.. i'm also runnin optimax now.. seems nicer after a few loads in there

i woulda got a '6 if it werent for the insurance.. i reckon you'll be lucky to get a quote at under ?1200 - ?1400 for a '6..
ohh and dont get a 'family car' like mrwotto's

hehe..
(ohh and mrwotto.. clean ya wheels!!)