If you can't stand the glossy screen, get the old iMac. If you can live with the ugly new case design, the glossy screen, and the strange new keyboard, get the new. If you want to buy a top of the line 24 inch iMac, the new one is probably better as it features a higher speed processor (2.8ghz)
were I in the market I'd get the new. even though I don't like glossy screens, I'd still get it. and honestly, I've never seen a desktop keyboard without a numberpad. was somebody not doing their job at infinite loop?