Upgrading from Celeron to Pentium

Thanks to everyone for all the info. I'm a total novice, but I know that it does seem like overkill with all the upgrades on a 2400, but I've upgraded pretty much everything else on this system, so I'm going to keep it as long as possible (so as to not feel like a complete moron for putting so much money into it). I'm trying to learn whatever I can about this stuff, so I can build my own computer later on (and not buy a computer because it's cheap, such as the 2400); this should help me get a little more experience working with the innards of the computer. Like I said, I'm not a huge gamer, so it doesn't have to be the best, most powerful computer, but I'd like it to last me a few more years. However, due to car repairs, I'll have to hold off upgrading the processor for awhile, but I'll eventually do it. I think I'll go with the 2.24ghz retail box (through newegg of course, haven't gone wrong with them yet). Again, thanks for all the help.

Joe