I have a Sunbrella top that came with my boat from the Superior Design tops. I've had it since 07 and its still in perfect shape and keeps the boat bone dry inside. Here is an actual photo of my boat on their website when it was new. http://www.superiortops.com/popup01.html
Its a 5 to 1 cinch system, so it has 5 buckles and a cinch that goes aroudn the base. Each side has 3 J hooks that pop under the rubrail and all the interior contact points are felt lined except the pylon which has a heavy rubber linner as does the back whch covers down to a couple inches above the swimstep.