What are you looking for in the wheels? They are very different in their designed purpose. The ARC8s will be the perfect offset to run wide tires without much/any fender modification. These are also one of the lightest wheels offered in an 18" staggered setup.
The VMRs come in 19" diameter but the offset is a little more aggressive, requiring either a narrower tire or significant fender rolling. The wheels are a bit heavier, which means something to those racing/autox'ing.
Both wheels have been used extensively on this platform and both "work" but offer different benefits/draw backs.
What do YOU want from a wheel? Looks? Performance? Hella-flush/slammed?