I have an Icon 3.0 Redline but I've been looking at getting a new bag for work. I carry my 13' MBP and various small tools and such for working on Smart Boards and computers. I guess I don't really NEED a new bag, I just want one! So I've been looking on the SI site. The KS is 120 and the BK is 150. I like the hooks and stuff being silver on the KS better than the black on the BK, but the BK is bigger. So I guess what I'm asking is this; is the BK that much bigger that it's not worth saving the 30 bucks? I don't know if I worded that properly. Any input on KS v BK is appreciated.