In reply to whenry:
If you have good skis (and kit) that are suited to the terrain you plan on skiing. Then I'd bring them, after all then they'll behave the way you know.
But if your gear is not suited, is really old... or lame. Then renting some good stuff is advised, as you'll enjoy your holiday more when the enjoy the skiing.
Note, that you can get some really good/botique skis from US rentals. E.g. I DPS rentals were available in CO, (atleast one had them, closer to VAIL though). These are skis that retail for ~1000 USD and up... plus bingins (~150-200 USD). Really nice to ski, too bad I sold mine (orig. Lotus 138) but they just didn't get enough time on the snow...