The anniversary model used a 5mm spacer I believe. Which is subtle but does give you a lil' something.
Combine that with a slight bump in tire width where it needs it. I'd go for the 225 45 up front, stick with the 255 out back. And maybe fit some of the shorter ROW springs to lower your stance and you should get that more aggressive look you want without too much compromise.
And then of course you should driver faster. That's the best way to get that more aggressive look, with more aggressive action.
Im thinking wider wheels is the best way to go. My tires are practically flush with the fender. Ive got an 8.5 up front and a 10.5 in the rear (with 7mm spacers on the rear). Ive got a super aggresive wide stance and it looks great. Your best option is a 7mm spacer in the front with a 14 in the rear (or it could be the other way around, I dont know). Get them from Todd at Epiq, he can set you up with spacers and wheel bolts.
What brand were your spacers and how much did it cost?
I don't know the brand . . . the local independent shop did the work for me, they ordered the spacers, longer bolts and did the installation. Parts and labor was $300.00.