I reached 57 MPH on my Pantera and it held amazing on that ice coast solid crap. Wasn't the LX model though, just the regular one.
If you're looking for solid carves and crazy speed rushes - this one will do great.
Both boards will I'm sure.
I have the 2009 one and the topsheet chips real easy though, dunno if they've improved that over time.
Go with the cheapest one.
Now that you brought speed issue up, that was by far one of the fastest boards I've been on. And I own/had fast boards. The base just felt like it was gliding on clouds.
But what impressed me was how damp it was.
Only LX available in my size and at a nice 40% discount for 2011. Just not sure if they truly are the same as 2012! And if LX is less damp as dist. told me (which doesn't make sense)!