Thanks for great feedbackIt's ok, don't be sorry! This is a large investment in a laptop. Personally for heavy 3d use I will be looking at the 2.2 and 2.6 seriously. I'm leaning towards the 2.2 just to keep thermals down but if there isn't a massive disparity between it and the 2.6, then I may opt for that.
As others have stated you would probably be ok with a 2.6 or even a 2.2. I'd recommend saving your money, but that's just me. The i9 doesn't seem worth it with the current chassis design, but others will argue against that.