More on CPU specs of the ReadyNAS Pro

Wish I had discovered this thread while DDR2 was still cheap! I maxed out my Business Pro at 4GB a few years ago thinking that was the limit. Oh wells...

Odd thing about the CPU upgrade is that the older and slower clocked E6600 and E6700 seem to give better hdparam scores than the newer and higher clocked E7600. Here are my scores:

E2160 (Stock Pentium, 1.80Ghz)
/dev/c/c:
Timing cached reads: 2354 MB in 2.00 seconds = 1177.79 MB/sec
Timing buffered disk reads: 1120 MB in 3.00 seconds = 372.82 MB/sec

E7600 (Core 2 Duo, 3.06Ghz)
/dev/c/c:
Timing cached reads: 3960 MB in 2.00 seconds = 1980.20 MB/sec
Timing buffered disk reads: 1574 MB in 3.00 seconds = 524.41 MB/sec

E6700 (Core 2 Duo, 2.66Ghz)
/dev/c/c:
Timing cached reads: 9878 MB in 2.00 seconds = 4947.44 MB/sec
Timing buffered disk reads: 1554 MB in 3.00 seconds = 517.78 MB/sec

The hdparam scores are pretty dramatic. What does that translate into real world usage? Would the E7600 be better for transcoding and streaming or should I stick with the E6700 given the hdparam scores?

Thanks!