The .46NT would be a good choice but there seems to be some "pot luck" involved with Evo's? I have an Alpha that has been great...but I was given a .46NT because the original owner couldn't get it to run right.
If you don't mind taking a chance, and have the ability to tune an engine, get the .46NT...

But...IMO if you want an engine that will give you probably the best bang for the buck get a Thunder Tiger .46 Pro...
They're about the same $ and the QC of the TT is better.

Edit: By "tune" I mean you might have to tinker with it...like take the blue limiting collars off, or seal an air leak around the carb...something like that