You might have to sit on one and compare back to back with KTM to see which one you like better.
I like how my KTM feels and since the Beta has the 06 KTM motor you might find a left over 2007 KTM 450/525 for a lot less or even get newer 08.
I don't know how the enduro machines will be, but the only downside to my Beta trials bike is the price of parts. I have no problem getting replacement parts, but they're 'spensive.