alright here is the low down on C's and B&M...
I have a C's and I have driven a car with B&M
C's has nice shifts.. you don't have to jam it into gears and it does not have that notchy feeling nor the metal feel...smooth and nice..<~this is what I have
B&M is very notchy.. have to shove the dam thing in to gears..this has a shorter throw than my C's... not by that much though.. very little.. metal feel and also tough...
C's is more of everyday shifter where as the B&M is more like the race one... you pick the one you want! they both are great IMHO..
B&M does feel really nice though.. but I went with C's because of the price! I got it for like $50 from someone who did not know what they had...
other than that... there are plenty of threads about the short shifters... please search...
hope this helped