Well guys, I'm stuck...
I went to my local shop that had a used BTB406 and a new SR1206 in stock. I sat down on a stool and switched back and forth between the two for about an hour or so. I didn't plug them in, because I didn't want the better electronics of the SR1206 to influence my decision... I wanted to decide on feel alone.
To get it out of the way though, I really don't like the finish/look of the SR1206 at all - the wood combo on the SR1206 looks like old teak wood furniture and I hate the look of teak. I actually much prefer the look of the SR506, but I'd want the monorail bridge (separate bridge for each string) of the 1206 on it.
So with that said, I'd likely be looking at getting a BTB676 or either a SR506 and upgrading the bridge, or a SR1206 and painting or dying the body.
The feel of the neck on the SR1206 felt a bit better to me than the BTB406 - and I'm just talking about fretboard width and spacing... However I did prefer the flatter radius of the BTB. But that used BTB406 had a pretty glossy neck, where the SR1206 had a nice satin one which I always prefer, so I don't know if that may have influenced my decision at all. Also, I'm not sure if the current BTB676 bass neck will have less gloss on it than that BTB406 did... But I can always sand the gloss off a bit.
The BTB406 was noticeably heavier than the SR1206, but I also read on here by one poster somewhere that the BTB676 was lighter than the BTB406, so I'm not sure how much heavier the BTB676 would be than the SR1206... I do have some jams where I stand and play for 4-6 hours at a time. But I do have a wide, good strap, and I can always get ultralight tuners if weight becomes an huge issue.
I preferred the body style and look on the BTB series a lot more (and the BTB676 looks amazing!) The SR bodies look too small and smooth to me. I actually like bass bodies that have flatter fronts/backs than totally curved bodies.
There are a lot more pros to me for the BTB, but the two the SR have (more comfortable neck and lighter weight) are pretty much my most influential factors.. Again though, I can decrease the weight of the BTB a bit, and I'm thinking that the bigger body of the BTB may make it less prone to neck-diving, which I could see the SR's doing like crazy.
I have a bit more research to do, but if anyone has A/B'ed the BTB406 to the BTB676, I'd love to hear which one was lighter, and if the BT676 neck was less glossy than the BTB406.
In the meantime I won't be back in my office until Thursday, but when I go back I'm bringing my strap with me so I can get a better idea of what I'd be dealing with in my normal playing situation.
Thanks again everyone so far for your input and keep it coming!
