Wishbone Boom

Good day!  Here is another in a list of potential Contessa modifications.

I am considering replacing the existing boom with a wishbone boom.  The original intention had been to gain sail area between the boom and the deck but there are also the benefits of the elimination of the boom vang, and raising the boom well above heads in the cockpit. 

The downside is the cost of the boom and a new main but the latter has been on my shopping list for some time.  Using a wishbone boom would necessitate a different sail.

Any comments?