I'd prefer the 2500+ because now it's 89 bucks and it has the extra 256K L2 Cache plus a little more headroom because the die is a little larger making the CPU a little cooler on average. I overclocked my dad's 2100+ T-Bred "B" to 2.3GHz and it reads it as a 2700+ in BIOS, Windows XP, CPU-Z, and WCPUID! Heh, I was pretty happy that I could do that on my first overclock. I had to lower the Memory's aggressive timings in order to get there however.
DFI i815EP, Intel Pentium III (Tualatin) 1.42GHz, ATI Radeon 9100, SoundBlaster Audigy 2 Platinum, Samsung 512MB SDR SDRAM, Maxtor 60GB 7200RPM 2MB Cache