I'm looking at buying a 27" iMac in the next few months and as well as using it as my computing base and link for an iPad I'm also toying with the idea of doing some digital sketching. Thing is, I've no idea what accessories and what software I should go for? I've heard Wacom tablets are good but I'm new to this. Also, is an iMac a suitable machine for this task? Any help and suggestions would be greatly appreciated. Finally, should I wait for a refresh? Will better cpu's and gpu's greatly benefit the type of work I'll be looking to do? Mostly, the iMac will be a hub for movies, music, web browsing, digital drawing, and some light music editing (I'm going to be getting a keyboard piano and will hook it up to the iMac). The reason I ask is that, as of now, I have enough to either purchase a new iPad 64GB 4G model or an iPad 1 64GB 3G model & a 2009 iMac 27" for the same price.