Hey Dennis, tell me something. The Tige DD's take a bit of weight to develop a BIG wake and the one comment makes me wonder what size you've got:
"ride one side of my wake and then cross to the other side and back again"
Typically with a BIG wake, the pocket on the opposite is completely washy or just really small.
With a skim style board, you'll need to step up the size if you are in a small wake.
There are a relatively small number of skim style boards available commercially:
IS 4Skim
Calibrated
Phase 5
Walzer Skim Pro
Trick Boardz
LF Custom (I would consider this skim'ish)
Victoria has a wakesurfer
Surftech Rousch (eventually)
are the market leaders.
With the wake size nailed down we can give you size recommendations.
Are you really going to try shuv's at 55? Never too old! You rock Bro!