I purchased my Sig P220 10mm as soon as they were released. It is an excellent pistol. I replaced the rosewood grips with some slimmer OD green Hogue aluminum grips, and they fit my hands perfectly.
If you own 10mm pistols, reloading is the only way to go. I just recently purchased 1000 180gr Gold Dot bullets from Wideners last month for $90. That was a steal!
Also, if you are looking for a holster, they are hard to come by. I dug through my box of no longer used holsters and found that a Blackhawk leather holster for a Springfield XDm .45 fit my Sig like a glove.
Here is a pic of my Sig P220 10mm-
Here is a pic of the Blackhawk XDm holster-