Well I'll jump in on this. I'm far from an audiophile, but have been a lover of ridiculous bass and some clean car audio installs with my brother in my younger years, so I know I like clean music, until I want bass that literally makes it tough to breathe. Those that have experienced it know what I'm talking about! As much as you say that your system blows away any factory system, well I wouldn't say blows. First, the factory system is 940 watts (110x4 @ 4ohms + 500w sub) not 500. Next, on the systems that you heard from Bennington, are you sure they were the Wet Sounds 6.5's? I only ask because they were still using Kicker speakers with the Wet Sounds upgrade. I do agree that speaker placement is a tough factor on pontoon boats. Down at your feet does little for your ears!

haha, I was looking at the amp you had for your sub, I see the distortion level is higher than say my SYN1 that I use for my two FA subs (850x1 @ 4ohms, 1000x1 @ 2 ohms with <.01%) the xxx is an amazing sub, cousin has it in his MB Sports boat. That is the cleanest sounding stereo I have ever heard in a mobile setting. Yes the Bennington stereo costs money, but as you said yourself, the stereo shop guy said he would have charged you a lot more to have the system you have, far more than the $1500 Bennington charges. So for people who want something that is definitely better than base factory, I believe it is a valid and useful option. For idiots(I use that term lovingly) like myself that want more and have the abilities to install many of these items themselves, sure, custom is they way to go. That being said, I know my system has cost me far more than $2G and I unfortunately/fortunately don't see it ending any time soon! Oh a 4v pre outs are nice, one work around is the Wet Sounds EQ provides a 4v pre outs to the amps regardless of head unit power. I still have to figure out where I may add one now that they have faceplates available, the one I got from my cousin was only ever designed to be surface mounted so the "lip" around it was only about 1/32-1/16th and I wasn't sure my hand was THAT steady with a dremel on an expensive helm!! As for your 72 year old cousin saying it sounded really really good, well I'd be impressed if my 75 year old grandpa could tell the difference between a cd and a record player!! Actually, he could, but he would think the vinyl had a clearer sound!! Haha, (I am completely joking about this whole last part, just found humor in the 72 year old cousin for some reason, both sets of my grandparents have passed long ago) oh, and as for setting up stereos, SMD is the way to go!! Worth the money to protect your components from clipping!!