I have a Super Chexx with the red base, US vs. Canada, updated sounds, etc. I got it from a dealer off Ebay that basically just gets it shipped from ICE (the makers of Bubble Hockey). It wasn't cheap but the machine is extremely high quality. This thing is made to hold up in bars full of drunk people so you can be sure that it will last in your home.
It's great fun especially for my 3 year old who is actually pretty good.
Tips for maintenance are basic: clean the outside of the dome, lift and clean under the dome (bur remove players first), wipe down the table. Visit the forums in case of emergency.