welcome!  those seem to be fun little boats.  There are plenty of mechanics and marinas that can help.  I think capitain yarr has had good luck with mcneil marine.  there is also places on this site that has different mobile people that can help.  good luck but if you want to save money and spent a lot do some of the work yourself. you can get a radio from any place that sells boat parts and get an enclosure for it that mounts with just four screws and enclosed  speakers that mount the same way.  here is what I put in my boat that I think would work for you.

http://www.jensenmarinedirect.com/jensen-water-resistant-gimbal-mount-housing.ht...

http://www.amazon.com/PLMR34-3-5-Inch-Sealed-Speaker-System/dp/tech-data/B000OJD... 

Hello and welcome!

Check out Overtons for marine grade stereo and speakers and the Bimini top.

I would recommend marine grade stereo componenets (head unit, speakers, wiring) since you probably get a little spray.

Crutchfields is also a good option.  They can send you customized install instructions and walk you through it if needed.  Their customer support is top notch.

If you wanted to buy locallly, try Custom Sounds...they carry marine grade and are competitive with West Marine.

I wouldn't take my boat in for a simple stereo install.   As long as you are not installing amplifiers and need extra batteries, I think you can DIY.

I wouldn't glue down hydro turf.   I think you would be happier with some snap in.    Capitol City Upholstery carries several lines of boat carpet.   You can find snap in instructions on-line.

Your rig is Coast Guard rated for "X" amount of passengers.   Adding seats / capacity is not a good idea.   I wouldn't breach the floor screwing in pedestals that might rip out or you could hit some wiring or your fuel tank.    It would also impact your performance....your boat seating is designed for specific weight points.  If you added seating up front for example, your rig might not be able to plane out or would list really bad.    IMO, adding seats just isn't a good idea.   It would also be an insurance risk and might not be covered.   If you need better seats while anchoring, maybe get a couple of folding camping chairs.....just don't use these while underway.

For the bimini, check out overtons.

http://search.overtons.com/?Ns=p_image_sort|1||p_purchased|1&Ne=1000&N=2070&cnam...

Be Prepared,

Sorry I didn't realize your rig didn't some prewired / set up for a stereo.   

I would get an estimate from Custom Sounds.   They know what they are doing and do tons of boats.   For a simple set up, they shouldn't be too expensive.   Maybe get another quote from Woods Fun Center.   Custom sounds could probably turn it around pretty quick.

I did find some info on installing a head unit on a sea doo boat.........

http://seadoosportboats.com/topic/1639-stereo-install-on-1996-challenger/

Hey there,

I had McNeil Marine do some work for me and I was pretty pleased with everything. They seem to be capable of doing a lot of different things for you or can arrange for someone to do it for you at their facility. It's nice for me since I don't own a truck.

They charged me $100 to cut bigger holes for two speakers and mount four total. I imagine adding a deck for you would be a little more involved, but give them a call and see what they think.

I'm sure a bimini is a piece of cake. That's a total of twelve screws.