I have an 8gb iPod touch 4g. It still works but its pretty slow and lags a lot because it has an old A4 chip. I also have barely any room left on (last time I checked I had 37 megabytes free on it). So I was considering purchasing a new one, but didn't know if I should wait for the 6th gen or get the 5th gen or just stick with my 4th gen. I was kinda hesitant to get the 5th gen because it doesn't have a brightness sensor which is weird in my opinion.