Keith, Ron "1989Mach1" (on here) with the 33' Donzi over at Castaway Bay has a floating lift. Go look at his, not sure if you know him. that may help you decide?

It's the boat with blue on it and checkered flag style graphics towards the aft. I think he's on the end of B or C dock. You can see it from the road.

I have a 13K sun stream and love it.
use it in new england salt water, and leave it in year round. Ive had it for 5 years, and the only maintenance I have had to do is add water to the batteries, and a gallon on hydraulic fluid this year.https://cimg2.ibsrv.net/gimg/www.off...8f744de7e3.jpg

Sunstream
 

Contacted Sunstream and they sent me the contact information for the dealer in my area. I've dealt with this dealer before and the service is not good. They last thing I want is a dealer who doesn't respond. Months ago,at the boat show, I requested from his information on the lift and never heard. I already gave him a down payment to move and level my existing lift. Finally got that done and soon as I put the boat on the lift the lift shifted. Emailed Sunstream and they called me, I called back the other day. We'll see what happens.

Boat weighs about 10,500 lbs. and sits on 18,000 lbs lift. They said they put 3x3 sacrificial pads on the bottom of each leg.
Neighbor has an older Harbor Hoist and as far as ultimate boat protection and accessibility seems like a good viable option.

I got a price on the Harbor Hoist and very reasonable. Waiting to see what Sunstream comes up with.

A very important factor is low maintenance. For lift maintenance, It cost about $2,000.00 every time just to get a barge out. Get's expensive after awhile. Let's see if Sunstream comes up with a price.

Habor hoist and airberth 2 different companies.

Even when the water back there was low none of us at castaway had a problem with the hydrohoists and the maintenance on the hydrohoists are not that bad. 4 ball valves two small blowers and some rubber hoses. The older ones can be patched if they leak. I just had a big patch done on mine from where someone hit it with there swim platform and made a big hole. Hydrohoist now has the poly tubes and aluminum framing but for a 12k side tie like mine run around 20 to 25 thousand.

Used ones can be bought for 4k and up just have to keep your eye out because when they pop up they sell quickly