wine users - Jun 2011 - most beneficial commercial wine software?

I'm sure the best way to support Wine is directly, through contributing
code, money, or other resources.

but out of curiosity, if one were to purchase a third-party commercial solution,
such as Crossover, Bordeaux, or whatever it is that Transgaming is offering
these days, what would be the best choice in terms of contributing to Wine?  I
guess what I'm asking is which of the wine-based commercial solutions
contributes back to Wine in the most beneficial way, whether it be through code
contributed back to the Wine code base, or through other means.

for some reason I can't edit my post...

I wanted to add that I did see in the FAQ that Crossover/Codeweavers seems to be
very beneficial to Wine, while Transgaming not so much:

http://wiki.winehq.org/FAQ#head-72731b215bbd1ce36e3b84ac7ce114925ce16460

I wonder about the others, though.  in particular Bordeaux, but I know there are
others as well.