Oh no, not this again. The problems were solved a long time ago. Just buy one. As long as it's in a store that would get new ones often (target, bb, apple, etc), you'll be fine. It was just a few weeks of production back in September that had really bad negative problems. That's all been fixed for the most part. Now you'll never get a perfect screen, I can promise you that with any device, but the current screens on the iPod touches are fine.
Nope. 30GB is proportionally even with the other models and their formatted capacities. It's actually a bit more, so they definitely didn't increase system storage.