Right, so i got the wheels fitted onto my car. Heres a little pic

As you can see it need to be lowered! Also the tyre sizes are very low profile, 215/35/18 on 8.5j wide.
I'd like to run stretch only on the rears. The et is 35 but it looks like if i dont run stretch on the front they'll be alot of poke and scrubbing!
What tyre sizes do everyone reccommend? I dont want to go to low as i've had bad experiences before so will a higher profile tyre also help me out?
Cheers