I purchased both, the BN-2 and the BN-2T, and imo they both deserve the same (excellent) recognition. Both are very enjoyable for short trips, like island-hopping in the caribic. Maybe I prefer the turbo version for the longer hops of the Seychelle-scenery, indeed if you just want to buy one, I'd suggest to buy the BN-2T.
But in my opinion both are worth the money. And it doesn't harm to ask for a bundle price. ;)