So the trusty old Blues Junior is up to its fourth iteration... I have a stock BJ III that I enjoy. I have thought about trying a different speaker, but basically I'm happy with how it is. Ain't broke, nothing to fix... It's a fun amp for living room and garage jamming. I have read a few online pages that say they're all essentially the same, but then there are cadres of loyalists who swear by one version over another... Lol Since there are now four distinct versions of this amp, not including special runs with the different cabinet coverings, I was hoping someone could post a summary of the different versions, and the pros/cons of each... Thanks in advance!