If you were skiing strictly park I would say get the T-Hall, but since you want to do all mountain stuff, the El Rey is way more balanced for all types of skiing. Check out the charts on the armada website.
Here's one of the few reviews that I've found of the El Rey:
A surprise winner in our ski tests last spring- the new El Rey twin-tip
may have the best price to performance ratio of any of the 07-08 skis.
It’s versatility, ease of use, and overall performance compare to much
more expensive skis. Armada may have been influenced by K2’s success
selling the Public Enemy park ski as a stealth all-mountain for
performance skiers on a budget, which we have to admit is a welcome
trend.
The El Rey is what you’d expect from a twin-tip built by a company with
a definite freestyle and park orientation- light, forgiving, with an
easy and bouncy flex. What surprised us was it’s solid feel, stability,
and predictability- not what you expect from the category or the price
point. The El Rey tracked well on bumpy hardpack, had good edgehold yet
easy skid-ability, and kept cool at speed. Also surprising- this ski
doesn’t have that short tip/long tail feel that plagues many twin-tip,
which suggests that it will work better in soft snow than the others.
At the price point, compare to the K2 PE and Line Anthem, but the El
Rey matches up well with any other park-capable twin on the market.