I think the stock 19"s might not have been balanced right, if ever. I've seen wheel weights on every other new car with alloys i've bought, but not this one - unless they're hidden.
The only catch with climate control is when you DON'T want to use it. If one day is much warmer than the last, you'll need to momentarily turn it on, adjust the temp, and turn it off again. If not, the fresh air wafting into the cabin will be at the set temp you last put in. So, if it's 55 and sunny, and your last set cabin temp was 73, you'll likely need to set it down near 65 and shut it off. Otherwise it will get hot and stuffy. Also, popping the sunroof can help some of that heat escape.