iverson9999 are you suggesting that intel test the speed of every pentium 4 chip to see if it meets the standard, and then the ones which don't are sold as celerons??
Anyway, for your application a celeron 2Ghz will be more than enough, ME will be alright if you already have a copy (if you need to buy an OS get XP home), as long as you're not seriously gaming and messing about with the PC I'm sure it will be fine.
Pentium 4 2.8 with M0 stepping.
Only air cooling tho