I'm running a Barton 2500+ @ 2.1GHz (it's an oldoldold stepping, will do 2.2 or 2.3 but not without excessive voltage and heat) and also a 1900+ Pally. The Pally runs 24/7 but the Barton doesn't for heat and noise reasons, so I could obviously increase my production a bit by running it nonstop, but I'd rather not. It's only off while I'm asleep anyway. In theory I could probably make it into the 200s with my current hardware (because there are a lot of zero-production users above me still) but the reality is by the time I'd get there, people are folding with more and faster boxen. It's really hard to predict where you'll peak in the list, but where I was going up 100 ranks a month pretty consistently, it's now been almost two months since I hit 500th and I'm not quite to 400th yet, so I'm definitely slowing down. Eh, but maybe once I get this job situation settled, it'll be time for more hardware