200fsb T-bredB vs. 166fsb Barton

I've got an Nforce2 and some nice DDR433 (yay winning free corsair) here, along with an SLK-800. Now I need a chip.

Having scrolled through the Barton overclock list, I see that if I get a barton 2500 I can probably overclock into the 180 fsb range (most are there, though a few get higher, a few lower). I refuse to pay the money for a 200fsb barton, and assume that most overclocks are fsb limited is because AMD is binning them appropriately (Yay for AMD's profits, Boo for our entertainment).

However, a t-bred will most likely take fsb's up to 225 without a problem. So my questions is simple:

Do I buy an XP2400 (make sure I get a t-bred B, and there's a special at the local comp shop that puts them ~ pricewatch) and reclock the bejeebus out of it, or would I get better performance spending more on the barton 2500 and living with a 180 fsb? I do a lot of statistics and information analysis with the machine, so the memory bandwidth is moderately important.

Thanks for your advice.