|"Gigabyte or Asus mobo?"|
Either is a good choice but you always have to look at the specs...northbridge, southbridge, audio chip, network chip, number of RAM slots, etc. It's always a good idea to google up some reviews & download the manual in advance too.
The board you have is based on an outdated GF6100/nF430 combo, I don't know why it was even used on an AM2 board (other than profit, of course). Even so, I think you're giving up way too easily. Floppy drives are cheap...IMO, there's no reason NOT to have one. Make sure to install one in your next build. If you had one today, you would have saved yourself about 4 hrs, 55 min...lol