I don't know about common, but I do know about 4 or 5 people that like the combo. 
 
Al will not like my system, because I'm at about 3:00 for a comfortable volume. He would not have enough gain with this current setup. 
 
Marc, I did decide on the Volumite on the Buffalo32 build, so that may negate the need for a preamp for the F5.