I'm also thinking about the 295s in back. Here's my logic:
Stock offset is et22 with 265mm on 9.5 inches
If you go to 295mm tires on 10.5 inch wheels with et30 your get,
-18mm for the tire (using Tirerack info), +4mm for the offset give a total of 14mm closer to the fender.
+18mm for the tire (using Tirerack info), +4mm for the offset brings you 22mm (3/4 inch) closer to the inner fender.
The Tirerack measured the 295s on 11 inch wheels which is conservative. So if the numbers above work, you should be ok.