I'm about to get a Keeprite/Tempstar 2 Ton a/c (C4A424GKA) and hi-eff 2-stage furnace (C9MPV75). The contractor is suggesting putting in a larger indoor coil...a 2.5 Ton (ED4x30) rather than the 2 Ton (ED4X24) for better cooling.

I checked on ARI and both seem to produce a SEER of 15 and EER of 12.5. Is this larger coil a good move?