I have a Milwaukee worm drive and various "regular" saws. It seems that the left blade worm drive comes in handy on occasion but we do 99% of our work with the more compact regular saws.
One point to remember is that worm drive saws generally tilt forward to adjust depth. When you are set shallow for cutting sheet goods, the forward tilt makes your reach more difficult.
Before you buy any saw look at a rear tilt conventional saw and think of yourself reaching across a sheet of plywood.
Here's one example:
http://www.dewalt.com/us/products/to...productID=3027
Good luck with your decision
Rob