The SN is not a light nor a heavy wind wind kite and needs 4-5 mph wind to get things going. It's a good kite though.
My SN is the standard configuration with 7PT spreaders and its an excellent
heavy wind kite. Its frame is super stiff and continues to pitch well in biggish winds. I'm just back from a week at a blowy Texas beach and I flew the SN and DS VTD extensively.
I'll grant you its not a good light wind kite, but with 7PT spreader would you expect it to be ?
Tim sells the SN with optional 5PT spreaders, which of course is a nod to this and with those I've no doubt its better in the lower end, but I've not tried that for myself yet.
The Nirvana and N3E are great kites, not Benson quality, but R-Sky has improved in that respect markedly over the years. I bought a set of N3E's and was happy enough with the build quality, but they will not wear as well as Benson kites over time - I've got a DSUL which has a ton of time on it and it's still it excellent condition really.
One thing in the N3E's favor is that there are different versions available, SUL through to VTD, which cover all your wind conditions/needs.