Since you are ONLY reffering to B series and K series..
Is that honestly a question? K series over B series. STOCK.
You can Build a B series all you want. You can also build a K all you want.. Which one do you think will be better!!???
K
but like said above.. Lets not even Get into the K vs H bullshit!
Also to the K owners.... Have you ever had an BUILT H2b? or are you just comparing because you "LIKE" your K series better?