I'm currently running 15x10 wheels with a 5.25" backspace on all four corners. I use 23.0x10.5-15 Avon Slicks or Hoosier 275/35-15 tires on all four corners.
I run a 1/4" spacer on the front and it just barely clears my coilovers. No spacer on rear, and I have at least a 1/2 clearance to the strut.
I have a modified version of the SubtleZ body on my car which provides an extra 1.5 of clearance at all four corners.
Below are some pictures with the 15x10s and SubtleZ kit.