Exide makes a good boat battery, I know that. I'm not familiar with their MC batts. I just know that after having a sealed battery that I wouldn't go back to the others. A good gel battery would be nice if the price wasn't so high.
You might want to think about the new Harley AGM (absorbed glass Mat) type. They have been having very good luck with them, no acid leaks, just keep them charged. You can order them from Chicago Harley Davidson or Hales Harley Davidson at 20% off list price plus shipping.
I have had real good luck with the interstate gel fill sealed battery(about two and half years now)and a battery tender to keep it hot to turn over that big shovel.