You can do single infusion with 6 row, so no worries there, but if you've got pils malt to use, go for it! Get some 6 row down the road, brew it again, and compare.
If I could get away with using all cluster I would be very happy since I have that on hand?
Is it better to say use magnum as bittering and cluster for maybe the FWH and late additions with the CAP?
6-row and 2007 for yeast will make a good CAP