Should I use WinME or Win2000?

I use my computer to print out paper typed in word, go on the internet and print on the internet, download and play music and MP3’s, burn CD’s, make and print out CD labels. I dont play video games on it. I need to know if I should use ME or Win2000. I have a Pentium 3 500Mhz, 128MGs of RAM, win 98se and my computer crashes way too often so I want to know which OS should I upgrade to.