Couple more questions:
1. How much better will the rumored new processor be?
2. Is the graphics card in the current 22in iMac good? I don't plan on doing anything graphics intensive.
1. No idea.
2. If you're not going to be doing things that are graphics intensive, then the graphics card doesn't matter all that much and I would recommend buying a current generation iMac. As an example, my 2009 iMac has a GeForce 9400M GPU that shares memory. The current generation have GPUs that have their own dedicated memory. The reason I bring this up is because I have used my iMac for Geektool, using skecthbookPro, iMovie, Gimp, and the GPU hasn't really been that important. So the basic version should be more than enough for your needs. Although you can currently get a refurbished 27" model for a lot less than the retail price. Here's one that I would buy if I had the money.
$1,659 +tax =$1,813.29
Refurbished iMac 27-inch 3.1GHz Quad-Core Intel Core i5
Eligible for OS X Mountain Lion Up-to-Date Program
Originally released May 2011
27-inch LED-backlit glossy widescreen display
4GB memory
1TB hard drive
8x SuperDrive (DVD±R DL/DVD±RW/CD-RW)
AMD Radeon HD 6970M graphics with 1GB memory
Built-in FaceTime HD camera