Get a Wacom if you're going to use it every day or you just want A5/6.
If you don't have much cash get a Trust (although you can't use it on a Mac).
I got an A4 one for my niece 6 months ago and she's very happy with it.
http://www.amazon.co.uk/TRUST-TB-4200-WIRELESS-SCROLL-TABLET/dp/B0002DCL6G/ref=pd_bbs_1/202-6399354-1347023?ie=UTF8&s=electronics&qid=1194479551&sr=8-1
If you don't have much cash get a Trust (although you can't use it on a Mac).
I got an A4 one for my niece 6 months ago and she's very happy with it.
http://www.amazon.co.uk/TRUST-TB-4200-WIRELESS-SCROLL-TABLET/dp/B0002DCL6G/ref=pd_bbs_1/202-6399354-1347023?ie=UTF8&s=electronics&qid=1194479551&sr=8-1