From your list, I would go with the GP 100. I would also check out a S&W M&P 15-22 and, as Bruce suggested take a look at a 10/22. They have tons of aftermarket support.
.... you put a whole new shine on the word overkill. "When you need it, and don't have it.... you sing a different tune."- M. Gross
Last edited by Glock40man; 10-09-2012 at 03:33..