I've got my Barton 2500+ running at 2.25GHz Stable. That is actually faster than an XP3200+, but my board reports it as a XP3000+. A BIOS flash might fix that, but the EPoX 8K9A2+ is plagued with horrible BIOS's and this one is rocking as far as performance/stability/overclocking.
At these speeds, my core has maxed out at 42°C @ 1.75Volts.