Yep, I had to replace coil #6 on my 2008 225. I can't remember the exact brand, but it was like $60 on eBay. No problems!
2007-2008 Optimax's had a recall on ignitions coil. If you look on the coil there is a serial number.. I forgot the number (look it up,) but there's a number that will tell you if the coils are the updated ones or the original ones.
Majek 22 Extreme/225 Optimax Pro XS
2006 Chevy 2500HD Silverado/6.6 Duramax LBZ