Yea, the FFI and II are tempting me because I like having them. 1 was slow and 2 was meh. 3 is where things picked up and began the snowball effect until you hit FFVII. After that I didn't care for VIII or IX, but I enjoyed X (not X-2).
But since they aren't iPad optimized, well, that kinda helps the decision. I hate 2x mode.