Difference between new iMac processors 3.5 GHz Quad i5 vs 4.0 GHz Quad i7

The only major software I use is Aperture and Photo Elements.
I have Bento about 7000 entries.
I am retired, no business app.
I am one of those that believe get the top of the line it will last an extra year or 2 of viable usage .
My current iMac is:
2008, 3.06 GHz Core 2 Duo with 4GB 800 MHz DDR2 SDRAM, NVIDIA GeForce 8800 GS 512 MB
Any thoughts ?
Thanks
Greg

The Flash drive will provide faster access to data, but does not directly affect the processor.
If you don't need the extra space, then go for the smaller Flash drive to keep data access times at their peek.
As to the difference between an i5 and i7 obviously the processor speed is one. But buffer, and cache and other specs that will aid in performance may be different.
If money is no object go top of the line.  Otherwise the i5 should work fine for what you want to do, and will be a marked improvement over what you have now.

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