Hi Adam,
I already have a Decklink SP, and I’ve been really happy with it, but I am facing a similar decision on the brink of HD in some iteration. From what I’ve seen, the Kona card offers a couple of feaures the BM does not, the biggest of which is upres capability. I saw it at NAB and it is just awesome.
I’m talking to Promax about all this, and their recommendation is the Kona 2, the Kbox and an iola. On the AJA forum, people swear buy this setup.