JL makes a 6.5 speaker that might be an option if you decide the 7.7 are to large. The 6.5 are a direct replacement for standard speakers.

Just hooked up a new Alpine PDX-F6 amp with 4 Polk Audio MM691 6x9's. Have them in boxes for setting out while listening at the beach. Man is that a good set-up. Very loud and clear. Have some older Polk Momo speakers and the new style MM's are awsome. They use neo magnets so they are light and easier to install. That all digital Alpine sounds better then anything I have heard. Hope it saves on the power usage.
Have a pair of Clarion 7" speakers in the logo spots and 2 down by your feet hooked to a Clarion marine amp and 2 10" subs in the back seat hooked to an AudioTek amp.
JL makes good stuff. I've put a lot of power to the Polks and have been very happy with them.

What did you buy for a flatscreen TV?

What size and brand sub did you mount up front? Thx, Jon