Well you guys have convinced me
I went ahead and rooted again, but haven't done anything beyond installing Busybox and blocking OTA updates, as well as creating a couple of backups along the way.
I figured this would be as good a place as any, so I would really appreciate some advice. I love to play around with my phone and even the rooting process was fun, but if things start to go wrong I panic and undo everything. And by "start to go wrong", I mean one or two force-closes. So, I guess what I'm looking for is the most stable 2.1 rom available, along with the most stable kernel. I don't plan on overclocking at all if it isn't necessary, although the low voltage kernels do sound tempting if they really can keep temps down. I really would just like the capabilities of 2.1 plus the benefits of a custom rom (no unwanted and pre-installed apps, having the ability to install custom skins, etc.).
So, if you've read this far, any suggestions? I really appreciate the assistance, and thank you!