Offsets questions?

[probedb]

Tried this in the general topic but no reply so trying a post

Offsets question again.

I found a much cheaper wheel similar to the RAcing Hart CX-R http://www.bkracing.co.uk/aspbite/alloy-wheels/gallery-wheel.asp?ID=51

I\'d preferably want 18x8 front and 18x9.5 rear, the offsets for both widths are et 30 and 42 and 45.

Are these usable or would I have to go with the 45 offset in 18x8 for front and rear?

Cheers

Paul.