I got my reps from a company called wheelbase. I spoke to a guy there on the phone for about 20 mins about the pros and cons of reps and how to look after them, really helpful. four brand new alloys with a mid range tyre for £510 delivered with center caps and new wheel nuts imo you cant go wrong.
I had genuine 17" monzas with goodyears and there is not so much road noise with the reps and mid range tyre as there was with the genuine and goodyears.
Regarding looking after them I covered them in jetseal and rim wax inside and out before fitting and wash once a week with born to be mild and no problems as yet.
End of the day mate its up to you and your budget. If money was no object i would have brand new genuine monzas with the best tyres money can buy. For the money i parted with for the reps i'm more than happy (at the moment)
Pm me your email address and i'll sent you some pics if you would like.