Rob
I'm leaning towards the Odyssey 680 after having read the specs. It's expensive (can't find it for less than £80) but it sounds the business. It's colour matched too!
Two things though:
1) How did you modify the support tray to allow for its extra height/width? Is it just a case of removing the lower lip?
2) By all accounts it needs a special charger, since conventional chargers won't know it's fully charged. Had any problems with this?
Cheers