iPod touch quick touch question

[SeVeN]

im thinking about getting my mom an ipod touch for mothers days, if my siblings cant help me get her a new one then i'll get her a used one from the local classifieds. can someone break down the differences of the generations for me, so i know which ones are the most desirable.

thanks

 

[EugenexYew]

1st gen - no cam, no speaker, no mic, no volume controls
2nd gen - no cam, no mic, has speaker and volume controls
3rd gen - identical to 2nd gen, but has upgraded internals
4th gen - 2 cameras, mic, speaker, volume controls, retina display, super thin and runs iOS 4 smoothly.

 

[AdrianK]

1st gen - Stuck on iOS 3.1.3, 412MHz, 128mb <A lot of apps require iOS 4; slowest of the bunch; no volume control - Not recommended
2nd gen - Stock on iOS 4.2, 533MHz, 128mb < Stuck on a recent build of iOS so not nearly as bad as first gen; adds volume keys; also has a slightly faster CPU
3rd gen - Latest iOS, 600MHz, 256mb < It's fast, does everything, highly recommended if she doesn't need the absolute latest device
4th gen - Latest iOS, 800HMz, 256mb < Has a much sharper screen that the other generations, gorgeous but non-essential; also has two cameras which take awful picture, back camera takes half-decent video

Basically, get either a 3rd or 4th gen, the others aren't really worth it.