I'm about to replace the spark plugs in my Civic due to it starting to have a rough idle and a bit of hesitation when accelerating up hills. I've just noticed it since the weather warmed up, but it's been a while since I've replaced them anyway.

I've checked for the "right" plugs (of course there are many) and they all seem to be the same temperature range. I was hoping to put in some slightly colder plugs since I live in Alabama and it's going to be hot for many more months, but there don't seem to be any (at least that say they work with my engine).

Is this even necessary, though? Should I just put in the stock OEM plugs?

I'm also still trying to make sense of the benefits of copper/platinum/iridium, but there are copper in there now so I'll probably just go with that again.