I’m craving a camera, but which one?

I already have a Canon Powershot A80, a 4 megapixel digital camera that I’m very happy with. Image quality is awesome and the camera has been great so far.
However, it’s a little bulky. I want something a little smaller and with higher resolution. I’m looking at two choices the Canon SD600 and SD630. They are very similar, with the main difference being the SD 630’s screen is 1/2 inch bigger. However you lose the optical viewfinder. The SD630 is about $40 more. What do y’all think? Here are pics, the SD600:

and the SD630: