well I would say to get the ipod nano 5th generation just because everyone else seems to be getting the ipod touch, so if you got the new nano, you'd probably be one of the few that have it.
The PROs of the ipod nano-
VIDEO CAMERA!( something the itouch doesn't have) the camera is a video only camera that comes with 15 fun effects excluding normal mode, including black and white, old film grain mode, sephia, terrminater cyborg mode( this one is really cool!), sephia,mirror( you can make twins with this) and some others.
FM Radio- Another thing the ipod touch doesn't have, and it comes with tagging so if you hear a song you like on the radio, you can tag it ( save it for later, and then buy it on itunes)
Voice Control- Although the 32 and 64gb itouch models come with this, the 8gb doesn't but this nano does!
Voice Memos
CONS-
Not really any!
ipod touch
PROS-
Games and Apps- over 75,000 apps to choose from including things like the bible, recipe apps, education apps, brain teasers, guitar hero tap , tap tap revolution, etc.
3.5 inch widescreen Display- This is very good for watching movies on, or tv shows.
Internet via wi-fi, email, and some other features.
If you want the everything in one ipod, then get the itouch, if you want a good quality ipod ( That not many people have the new generation of) that has features the itouch doesn't like the video camera with effects, and fm radio, then get the nano