I voted for the 17"s, but those 18"s wouldn't look too bad with less of an offset in the rear (I realize you already have them from the purchase, but they should have given a little better balance when it came to choosing the offset, IMO). Good luck with your decision and either way, your car will look very cool.
One thing to take into consideration is the ride quality that'll be achieved by running a slightly smaller wheel combo. than the other. I've heard 19"s ride rough (not much feedback on 18"s), so it may be more practical (& cheaper) for you to go with the V48s and sell the Foose wheels.