From what I could find on here there have been two runs of the BBII (2x8) with different speakers. The first run had Bag End speakers which had a more degradable rubber surround and the second run had better Celestion speakers. I read something about a possible third run with Eminence. Which speakers sound the best and how do I tell the difference? In one of these pictures it looks like the cones are smooth and the others are rippled. Which is which? Thanks.