In short pretty much but as I have stated the SB are actually on par with the older IB for 99% of general workload. If you ever edit photos or videos it would be about 2x as fast also so you are not loosing performance even now.
You can also overclock higher allot easier which has to be a plus with more fun to play around.
This is also why I suggested the cheaper SB core because yes you could sell it and by IB as soon as they are out for the similar 3930k then which would really shine in the next performance step and if you compared the SB and IB of the two socket types there would be no reason to run the 1155 IB's then.
Yes RAM can be upgraded for a long time and you should not be an issue with the 2011. You can just add another 4 chips or replace all once price drops again in the future.
Yeah the SLI may not be needed now but I would never say never. I also often upgrade a single card before going multiple but this gives the option to get the best out of two should I ever feel like taking the next step for further power or if you start editing/rendering allot of large files.
Kind Regards,
Adam
hmm pro's and con's to consider it seems.
Im unlikely to bother buying the IB 2011 as once its built ill be happy with whatever so i dont know if its better to get the older socket IB now or stick with a 2011 SB...