I've had good luck with these
http://shoremaster.com/product/rhinoport/
The nice thing is you can load and unload very easily being able walk around the ski when its on the lift also its easy put the covers on the skis with the walking area. The only time I had an issue was during hurricane Irene and the storm waves broke one of the clamps off and the ski rolled off but I fixed that going forward with a third post on the connection points and a cleat on the dock vs using the one on the shoreport and haven't had an issue since. With that said if you can afford the sunstream lift that is the most secure way from what I found, I use one for my boat and love it I just couldn't justfy paying that much for the skis. You can get the shoreport drive on lift from Center Harbor Dock and Pier and you can get the sunstream from watermark. If you do get a drive on make sure if you have a dock or rocks in front of it you don't over throtle and slam into them. takes some practice.
have fun this summer if it ever comes
