Well, I'm in the market for the same thing!
I've been looking between the tarptent, MLD, six moons, etc. and I think I finally found exactly what I'm looking for.
The six moons designs "haven" w/nettent. They sell poles, so she could take the poles when she doesn't use trecking poles, and when she is using treking poles, she can leave them home to save some weight.
The Haven is a double wall tent, with 2 entries, only weighs 2lbs.(one of the lightest I've found), and the tarp can be pitched before the net tent, so you don't get the inside of your tent soaking wet when you have to pitch it in the rain. And, if you want, you can pitch just the net tent when it's nice out, and have a great view of the stars.
Now, if I could only convince my wife to let me spend the money...
I'm pretty sure this is what I'm stuck on, unless anyone else can convince me otherwise...