I personally own the 4GB version and here are my views.
soon after getting the 4GB version i realized a few things some are +ve while some are -ve points.
1)it's really one of the sleekest and smallest PMP players ive ever screen.
2) really good battery life.though apple claims 24hrs..it easily gives around 15hrs+ with only music.:hap2:
3)the screen is beautiful but too small for watching movies and stuff.
4)also 4GB\8GB of memory is not good enough if you have a large music collection and incase you are planning to add music videos\moves at high quality then just forget it..you will surely run out of space sooner or later.
(atleast i did
)
5)its not totally value for money keeping in mind the storage
rice ratio. infact the 80GB 5th gen classic ipod looks more value for money and costs just a tad more than the 8gb nano.
*80GB has spinning HDD while nano has flash memory*
incase you are looking for a small,only music pmp which you are going to carry along or use while jogging(superb for this purpose) etc. then nano it is..
but if you want something with more storage,bit bigger screen and dont mind something that is little more heave and bigger in size than go for the 80GB classic.
you can also look at the 16\32 GB ipod touch ..or other PMP from creative etc. but i personally like\used to the nano's interface ..specially coverflow is awesome and pretty useful.
by the way the prices youve mentioned are official prices..look around in the grey market or indiaplaza \sifymall and you will find it very cheap.
dont worry about warranty etc., of grey pieces cause apple honors worldwide warranty and you can claim warranty even for grey pieces.
(ive tried once)
here are the grey\online prices to make your decision simpler.
Nano 3g
4gb- 6400
8GB-7900-8000
ipod classic 80gb-10,000-11,000
PS: i am no apple fanboy but feel ipods are really one of the most innovative and easy to use PMP ive ever seen..
though they(specially nano) are not totally value for money..the SQ is quiet good..(not as good as high-end pmp's like archos\cowon's etc)
ive heard about creative pmp being really good ,specially the new one's ..so you may also wait for suggestions regarding them.
phew !! that was all experience \personal views regarding ipod. hope ti helps.