The poly ones are just as good I've got four of them work great after you get them adjusted.Tactical Innovation's 25-round steel-lip composite ones.
Pricey, but once you get them adjusted to your particular magwell (Did I mention they're adjustable?), you shouldn't have feeding issues of any kind.
I haven't had a single mag-related issue with my 10/22 in the over 3k rounds I've put through the 4 I have.
You can even take them apart to clean them, although I haven't yet.
If you wanted to get some on the cheap, you could get the regular, non-steel lipped composite ones. I'm pretty sure the lips on those are made out of the same composite as the rest of the mag, so they should hold up well. And, they're still adjustable, and you can still take them apart to clean them.
~Edit~ In fact, the only problem I have with them (besides them being a little on the spendy side), is that it's a pain getting them loaded up faster than I can shoot them dry.
My poor Butler Creek mag loader is getting worn out from how much I'm using it.
I think you should try the poly ones first with the composite feeds to see if you like them and if you do and the feeds wear out (which I doubt) you can always replace them with the metal ones MHO.well I think I'm gonna go for the TI steel lip poly ones thanks for all the advice.