the elray is armada second best all mountain ski, i have them from the 07/08 season and they are still holding up no edge cracks! i personally wouldnt buy them again since i just purchases ar7s late this season. the reason i say this is because of the ar50 sidewall, it eliminates swing weight it is so easy to spin and whip those skis around. If you are going to be skiing 50% park 50% groomers, then i would buy the el reys and mount them at recomended or ski center not true center. If you are going to be skiing all park and mostly rails then get the thall. if you ski anything inbetween i would get the ar7 however you will not be disappointed with either ski.
I hope this helps.