Been on an 06 and ive never seen the tower shake with a tower full of boards.
Salt series is an expensive option if truly salt free
Honestly there is a resale concern because of the lack of options a 245 might come with vs an x series. But don't buy a boat for resale. Boats are a depreciating assets, so it's useless to buy a boat for its resale. Especially an x45 now that the 46 is out.