I have yet to hear the BAT50SE, but decided against it mainly because it was less flexible and only accepts balanced in and out. The SF Line 3 SE has both balanced and single ended ins and outs. I also liked the incredibly beefy power supply,superb build quality,and overall feel of the unit. As for sound quality, I'd rank [the SE in particular] as being exceptionally neutral,but not to a fault...it's actually addicting in the way it let's you know all that's there without seeming analytical or distractingly excessive.I hate to sound like an ad for it, but I've found that it's the closest thing to SS precision, accuracy,detail and overall "competence" combined with a tubes' inherent naturalness. It needs plenty of break-in time(but don't let that scare you,it's just true) and if you really feel the need to add a little more "character",a good power cord(s) will make itself known in the mix. I've found the Harm.Tech AC11 has a very similar personality (see very neutral, w/added "roundness" and improved blackness between notes), while my Custom Power Cord Co.model 11 also improves much like the H/T,and adds just a touch of that warm aroma.As for dealers in the N.Y./N.J. area,I've had excellent service at Toys From the Attic (914-421-0069) (in White Plains - and worth the trip), tell Mario:"Grant says Hi".