I would go with the XD40, just because I am Glock'ed out. Had 2, great guns, but I really like the way the XD feels. Hard to explain, Springfield makes a nice gun and I have seen a number of them at the range. I am sure I am in the minority on this decision, oh well!
Styer M40 & SW9VE user, Racer and QA1 and Carrera dealer