There have only been 2 only been two LEs really worth buying from a game play standpoint so far - Tron and Xmen.
And only two went up in value (ACDC and Tron) if you are looking for 'investments'. Not sure if METLEs have really gone up in value after the initial silliness.
For every other game you may as well go premium and then only if you like the gameplay better than the pro.
Just my opinion guys.