I didn't know where else to post this and I tried using the search function but came up with nothing.

I am between the two. I can't decide which to go with. Is it really worth the expense for the K series? B series is cheaper yes, but will it be as good as a K series down the road? Which is stronger?? Internal and power wise?

If anyone could put some input on this I would really appreciate it. Especially those who have had both...

Thanks in advance