I have plenty of experience with both, but the XD has really caught my eye.
Apparently, Springfield has plans to introduce an XD-S in 9mm this year. I wish they had done that last year, though to allow for more "break-in" time.
Polymer frame= win! Thin slide and grip= win! 9mm= win!
"Those who would sacrifice liberty for safety deserve neither liberty nor safety."- Benjamin Franklin