Hey Brent...
On another related note...what sort of disk/type/configuration is installed now as compared to before; Raid-5, Raid-10, and speed? The CPU/RAM might not see a notable difference, as this site might not be really seeing much activity or is probably not that CPU bound (negligble) except for instance if a whole bunch of people were doing searches at the same time. Can you get status/counters on your hard disk read/write access times for read/write operations? Is it Win or Linux OS? Read times might be another helpful indicator of change/increase in peformance if you compared in the past...i.e. the hard disk is a whole lot slower than RAM, and the system wastes a lot of resources and takes a lot of time to move pages of data back and fourth between memory and virtual memory. Any idea if if your pagefile is at least 1.5 times size of RAM allocated? Maybe there is some more OS tuning is what I'm getting at IF by chance you are not seeing much of a difference on your end. Sounds like all is good though.. Good Luck.
DC