I've got two sansa ... the M200 is my preferred unit by a long ways but it's showing it's age. The other is maybe a clip? No actual 'clip' but it has internal memory as well as taking SD cards ... and a lithium battery that is at least user accessible but that thing is the dumbest player I've ever encountered. EVERY time I power it on, it reads meticulously through both memory stores, separately, meaning it took three minutes to power up and I only had about 6GB. That battery lasted, though. Between charges, I mean. But the proprietary USB cable? Ugh. Deal breaker.
I am relying now, on a nameless thing from NKPC that I paid $1.87 shipped for. Battery is not accessible in addition to not being off-the-shelf (seriously, a standard watch battery would make me happier than whatever nonsense they chose) in addition to providing 2 hours of listening between charges. This, because they crammed a tinny, stupid speaker instead of a real battery. Uh, also the LCD glue has been overcome by me setting it ungently in the cupholder, so now the display (which is nigh useless because it displays 8.3 names, only) is crooked. But it comes with a flashlight, which continues to work even after the firmware shuts off the player.
Sansa needs to bring back the M200. Only player I've ever been happy with. Of course, it's firmware was a little stupid but you learned to get around that. It didn't know about ID3 tags so even though its 'random' was badly written and you couldn't use playlists to save your hide, you could just bulk rename all the files on the device and it would play them in that order. Supposedly there's a beta build of RockBox for it, but this is the one Sansa that you can easily and irrevocably brick trying to add .ogg & .opus support.
Touch screens don't belong on a device you throw in your pocket. Seriously what were they thinking? Also, since the batteries die, why don't more players use AAA batteries? You can swap those in whenever you want. Buy rechargeable, you'll only need about two.
I've never touched an iPod. I don't expect to. But given the strong opinions I've given, would any of you give me different answers than you gave OP? And my boss has two Zunes. Loves them. I think I could appreciate them, I guess.