What do you guys think of the SR-407 and specifically the SRS-4170 system (407 + 006t)? I'm in the consideration department but I want to make sure I make the right call.
I have listened to STAX - lots of em - but not extensively. Most experience I have had with the SR-009, enough so to conclude that its signature is not quite to my liking (slightly sterile) and I prefer some of the Lambdas and SR-007 overall. I did listen to (and compared to the 009) one Lambda in this color and it sounded fantastic, perhaps slightly less refined and less solid in the bass than the 009 but also slightly more sweet and organic. Quite similar otherwise, sonically. I can't say if that was the 407 as they all look basically the same. May have been the Nova classic.
SR-007 mk1 with an amp to match would be my choice if I had the budget, but I feel I want to play it a bit safe and jump on the "entry-level" wagon first.
Can't comment on your main question but I'll comment all the same ...
SR-404LE's are ridiculously better than SR-307's.
Way better highs. Way better lows. Way better instrument separation. More quiet in the quiet parts. ... a whole other order of Lamdba.
I know because I had the SR-307's ... and then sold them after hearing/listening to the 404LE's ...