The only iPod you can get is an Apple. But personally I detest iPods because they are made by Apple and work with vile, control-freak iTunes which tries to tell you what you can do with your music.
If you want an MP3 (which is not an iPod) I would have a look at the Sony range -- they come at various prices and seem to offer better value and better sound than Apple. Also you can use them without installing control-freak software on your computer.
If you must have video you'll probably exceed your $150 budget but have a look at Cowon products.