Which ELPH series is best in low light?

James the ELPH 310 and 320, would they outperform the ELPH 300, especially in lower lighting? With my limited knowledge, the 300 & 500 have a f/2.7 but the 300 has only 12mp vs 16mp for the 320. Well 320 I see has a touch screen so rules it out. The 310 has the same 12mp but only a f/3.0.....so 300 vs 310....have you owned the 300 as well? I will inbox my friend above, but yes I can go $300-$400. Since I'll never be taking the pics as others will have to for me being paralyzed, the smaller ELPH in Auto is the one. Yes I'd like the newer Digic 5 and more automatic scenes, 58 I think in the newer models but I end up with the 300 as best IQ..still TBD, thanks!