I love my 4G video iPod, still going strong on the original battery. Didn't know those had Wolfson DACs, but I've always been pretty happy with the sound quality.

If the battery starts to fail, I plan to have the battery replaced...it's been such a dependable unit. I could use more capacity, can't synch my whole library at a time, but oh well. I just toggle on and off artist selections or genres every so often.