Your choice of camera should NOT be influenced by the RAW editing options available to different models!
RAW Image Task in ZoomBrowser does a perfectly good job for the G9. DPP (for the G10 - supposedly!) simply has more bells & whistles, such as Curves Control... But, as you have seen in responses to your other posts, there are also alternatives to DPP. Adobe's ACR which comes with PhotoShop (& Elements) is a very good alternative to DPP - some will say it's better - it's all a matter of practice and personal opinion...
On the other hand, deciding between the G9 & the G10 is a whole different ball game - mainly due to the significantly different zoom range on offer. Your decision as to which body to buy should be made on the strength of what you intend to shoot... If you think that the 28mm wide-angle (against 35mm) is a better option for you then the G10 is the way forward, but the quid pro-quo to that is a large reduction in maximum zoom from 210 on the G9 to 140 on the G10!
Also, FWIW, I would largely IGNORE the increase in Mp size (12 to 14). It is HIGHLY UNLIKELY to have any impact on Image Quality, and may even result in a degredation of IQ over the G9 !
Just my two cents worth...