Hi guys, right i am really torn between just sticking new tyres on my GSi alloys or getting a set of BK999's

currently wheels have 215/50/17 but if i go with replacing them i will get 225/45/17 to make it nearly £50 a tyre cheaper.
Can get a whole set of Pirelli P6000's for about £450 inc fitting, balance and tracking etc.

Now for the other option..

A set of BK's the grey brushed steeel effect ones are around £550. But i then have an option to put Avon ZZ3's on instead of some rubbish ditch finder tyres.
making £650 all in.

If i am honest i cant decide if i want to part with £200 extra cash or not.
I could save that money and put it towards my PS3 when GT5 finally comes out.

suggestions welcome lol