I'm currently using 4061's into the Church Audio ST9100 preamp, then into the line in on my Edirol R-09HR. I recorded some acoustic jazz up close with the preamp turned up full and the R9HR set to level 52/80, apparently this is close to unity gain.
I recorded a loud Steely Dan tribute band last night, again really close, with the preamp gain at about 60%, R9HR input set the same as before. I recorded with the preamp's bass filter engaged last night, but without that for the acoustic jazz.