8" will give more low end and if you want sound at wakeboarding then you are definitely going to want to look at HLCDs.

I don't think kicker has an 8" horn? Exile obvouisly has a big following here so you might try Brian. Also expect to start seeing used 485's go up for sale this spring when people switch over to the new Rev stuff.

I don't know anything about the Bazooka you mentioned. I have also seen some Memphis tower speakers at a couple shops around here, I don't know anything about those either.