Hey Tubedude,
I'm finally getting back to you with my track report I promised.

It took me a few days to get everything where I thought it was set up pretty well, as far as getting the BIOS and everything set up for my system. Then there was my hard drive crash the day after I set everything up, knocking out my RAID array I had set up.

Anyway... I'm back in the saddle again, as they say.
I completely reformatted, so to do a track test I basically loaded a bunch of nonsense onto the hard drive - well, not nonsense, but rough and final mixes of all my songs I have backed up on cd. lol It's like a history of my life as a musician in 5 minutes...
I figured I would do your test you were looking for, so I loaded up a whole bunch of tracks and put effects on each one. I started off with the 24 you requested. I had 1 effect loaded on each, plus the Vegas track FX on each track (I don't know if they are "active" if you don't adjust them - all the controls are flat, for example on the EQ, but it is "engaged" in the FX window). The FX were a mix - I did have 2 events of Sonc Foundry Acoustic Mirror running, which is the biggest CPU hog I know of.
It went fine. No stuttering, no dropouts. Pretty freaking amazing.
The tracks are all 24bit, 48khz.
I kept going and ended up with 29 tracks. No problems.
I did this the other day before my HD crashed, and it seemed to run out of throughput on the hard drives at around 32 tracks or so.
16/44.1 tracks went all the way up to 70 tracks without encountering throughput problems. (This was before I had made some significant BIOS adjustments, etc.)
This is all on my new setup:
AMD XP1600+ (today's test listed above was done overclocking the system a bit - 145mhz bus speed (1.52ghz - seems pretty stable, but I'm a little worried about my old video card handling this more than the CPU)
Epox 8K7a+
512mb Crucial DDR PC2100
WD 27.3gb
IBM 30gb (freaking thing crashed the other day, and IBM's disk fitness test seems to have fixed it for now...)
I'll be getting rid of the IBM drive, since I don't trust it anymore. I have 2 40gb 7200rpm drives on the way to stick onto the RAID controller onboard, which should be nice.
Have fun with your new toys!!!