Thanks for the replies...
I hadn't thought about upgrading the machine's OS and doubling up the RAM while continuing to use the same MoBo + E8400.
That's an interesting avenue since those parts could be re-used in a new build centered around an i7 CPU and MoBo... doing that would also mean reformatting killing two birds with one stone.
When it comes time for a new build I could re-use:
the case + PSU,
the vid cards,
the (new) RAM,
the (new) OS,
the HDDs,
and all the various peripherals... meaning basically that I'd only need to buy the MoBo and CPU (though I'll probably be tempted to pick up a SSD as well).
Gentlemen, thank you all very much for your input... one of these days I hope to get IL-2 '46 uptodate and fly again
C_G