Nice...
I just put the same crankset on my roadie last week. Had a good ride last Saturday (86 miles) including a nice 5 mile climb. The compact crank was great, and I was still easily able to hit almost 50mph down the back side of the climb. I didn't change the FD - just using the stock 105 - and am having no shifting issues (have about 200 miles on it now).
Very tempted to try out an Arione myself...