Benchmark History?

[paul.nord]

Does anyone have a good history of Apple Benchmarks?

I'm comparing two plans:
A) Replace MacPro's every 4 years.
B) Replace iMac's every 2 years.

Lots of things change over that time scale. I can throw a _lot_ of money into the best tower available and keep it for a long time, or I can get a "good" consumer-level system and replace it more often. A 2-year-old iMac will still have great value elsewhere on campus.

I've found this so far. But, with changing processor versions, memory speeds, etc., the CPU speed is not a good comparison.

Date Processor iMac Speed
Aug-98 G3 233
Oct-98 G3 233
Jan-99 G3 266
Apr-99 G3 333
Oct-99 G3 350
Oct-99 G3 400
Jul-00 G3 450
Jul-00 G3 500
Feb-01 G3 600
Jul-01 G3 700
Jan-02 G4 800
Jul-02 G4 800
Feb-03 G4 1000
Aug-03 G4 1250
Nov-03 G4 1250
Aug-04 G5 1600
Aug-04 G5 1800
May-05 G5 2000
Oct-05 G5 2100
Jan-06 CoreDuo 1830
Jan-06 CoreDuo 2000
Sep-06 Core2Duo 1830
Sep-06 Core2Duo 2000
Sep-06 Core2Duo 2160

Date Processor PowerMac/MacPro Speed
Sep-99 G4 350
Sep-99 G4 500
Jan-01 G4 533
Jan-01 G4 667
Jan-01 G4 876
Jan-02 G4 1250
Jan-02 G4 1420
Jun-03 G5 1600
Jun-03 G5 2000
Nov-05 G5 2500
Aug-06 Woodcrest 2000
Aug-06 Woodcrest 2660
Aug-06 Woodcrest 3000

Thanks!
Paul