Vegas heat has been pretty kind to my CD's. I have a 10 disc changer mounted in the trunk. CD-R's on the other hand are a different story. Whenever they get hot, they always start to skip when I hit bumps. Although as a general info for everything else, Black CD-R's discs do not have this problem. When the temp hits like 120, they will still read just as well. Problem is now, I can't find a retailer that sells these discs now! If it's not one thing, it's another.... For the record though, I will make one reccomendation. If you want multple songs, but don't want to mount a CD changer, you may want to opt for an MP3 player. In dash, or external is up to you. When I get the $, an iPod will be the next thing for my car. A long enough cord, and it can sit in the change holder behind the ashtray on the center console. And it's small enough that I can take it with me to prevent it from heat damage by leaving it in the car. But what ever player that suits your size and memory requirements should work just fine. -Robert vin 6585 "X"