if you look at the op thread, he wants to add 2 on top and 2 on the bottom. I would think any of the 12's mentioned would add some bass to the system for just chillin on the lake. I put a kenwood 10 in a box on my sis tooner that came out of my old supra and it does a decent job of providing some bass, but like david mentioned, it can't be heard 100yards away. not the goal tho and I'm sure it's not the goal of the op.

at the prices mentioned, I'd pull the plug and play around with them. heck, if the 2 on top do no good, sell them on cl and recoup 75% of your $150 outlay

he did mention that jl is out of the price range for his intended application and so would exile-should leave it at that