I'm running that same set up in both my b4 and b4.1, and it be considerably better than the brushed versions and NimHs I had before
Bought the 2nd combo from HK too, and if your happy to wait two weeks for it to come, then their an absolute bargain. Have had no probs with either combos, highly recommend - as already said above, if you don't get it now, you'll just end up geting it in a few weeks/months and end up having spent aload of money on NimHs etc when you didn't need to.
You could easily for around £6o'ish get that set up and a lipo from HK. Heard some bad things about HK lipos, I got a Winforce 5000mah 2cell for £17 from HK, and I've had no probs with it
