Already I'm noticing lag on my 5th Gen. Touch... not as much as the 4th Gen. but still there. I only have 43 apps, (and seldom have more than a few open at the same time) but once a week or so I re-start the player and this frees up some RAM. Often, my Nano is faster at browsing music files. My Xperia Z has 2Gbs of RAM. I don't think 512mb on the Touch is enough to make it very future-proof. What do you think?