Personal preference I guess. If you just want the lightest rifle you can find that will shoot well, more power to you.
I have always preferred heavier rifles. I'm a big guy, so what's a pound or two on a hike? Plus it's much more enjoyable to shoot. My wife had an ultralight 308 that fit your bill -- good shooter and under 7 lb scoped. But it was more punishing to shoot than my 300 WM in a Winchester M70 or my 338 WM in a Remington 700 XCR. She finally claimed my 8+ pound Bergara Ridge in a 6.5 CM and won't give it back. She wants the S20 now, but I'm putting my foot down

)
The balance on the S20 is awesome, so it handles much better than it's weight would indicate. I like the ergonomics better than any other rifle I've shot (grip, adjustable cheek rest, good forearm width). I like the integral base, threaded barrel, etc. I could go on. But its not just me...everyone that has shot mine wants it.