Thanks for the info, guys. here's what I'm thinking.
Perhaps I'm going to end up going for the Trailstar full over the Trailstar Mini, but I'm a side sleeper that doesn't mind curling up. It would bother me to not be able to stretch out my legs inside a bivy, but in a tent it wouldn't bug me at all. I've slept in some confined spaces before. I'm generally a very, very easy sleeper and nothing wakes me up.
I'm going to stray away from full bug bivy's. Maybe I'll own one in the future, but not for this purpose. The "fun" (clearly Type 2) of going out in a big thunderstorm or early fall hurricane and sleeping in a field or clearing is facing the elements and winning, NOT getting wet. I think the Tarp does 99% of the job, but just in case I can't get a good pitch because of my site, or in case water saturates around me, I want good coverage from my bivy above and below. I don't need sustained exposure waterproofness, but I can be talked into eVent, as my understanding is that this is the best WPB fabric since it has pores.
Phew. Getting carpal tunnel over here.
I'm looking at the bags from integral Designs, but I think only the Spartan Bivy has bug netting. If someone knows otherwise, let me know.
Otherwise, I'm looking at the MLD Superlight Bivy at 7.5oz, but I don't know how waterproof the silnylon bottom is and I don't know what "Endurance" fabric has in the way of comparative strengths and weaknesses.
I have yet to find an e-Vent bivy with a bugnet. If you know of one, let me know! If I missed it in previous reccomendations, I might catch it in a minute...
Thanks for the help!