Christina - I’ve got an old-school Virga from Shires, so I don’t speak from first-hand experience. But I suggest you check out the Sublite-Sil and Contrail (akin to the Virga). The other models are getting too heavy for my needs. At Six Moons, I suggest looking into the Wild Oasis. For a first-hand opinion on that model, check out Mags’ comments at pmags.com. He’s put in the miles and knows what to look for in a lightweight shelter. As for the Quarter Dome T1, I hate to be a pessimist, but you asked, so here are my concerns. It’s twice as heavy as the other mnodels I’ve mentioned (and probably twice as bulky as well). It’s interior is narrow meaning your gear will have to go outside under the vestibule where it’ll be subjected to rain splash and critters. And it’s made of coated nylon which in my experience, breaks down over time and becomes about as water resistant as cheese cloth. Sil-nylon does not.
As for a rainsuit, forget about the old yellow rain slicker! I suspect its very heavy. And it’ll soak you with condensation on the inside when it’s raining on the outside. There are much better options if your budget is flexible.
I use Sierra Designs’ simple nylon pants. Light, very packable, water resistent but not waterproof. They breath much better though than the gore-tex pants I’ve had in the past and I’ll trade that for 100% waterproof anytime. Wet legs aren’t a big deal to me. For my jacket, I wear Frogg Toggs. They’re light, inexpensive, very breathable (!), and last much longer than you might expect. I’ve got about 900 miles on my current jacket with only minimal signs of wear. And I’m hard on jackets. Oh, and they don’t have that wet, saggy nylon feel when they get soaked. They always kinda feel dry even when they’re not.
As for your warm long pants, double-check your weight. 4 oz would be surprisingly light (I think the SD pants I describe above weigh 5 ozs yet have no liner whatsoever). As an alternative to consider, why not carry some mid-weight polypropolene liners and wear them with your rain pants which are already in your pack? That combo will be plenty warm enough on cold nights. Cotton in any trail clothing concerns me because if it gets wet, it takes forever to dry, all the while robbbing you of body heat.
As for your warm jacket, take something that can be worn under a lightweight rainjacket. Fleece is nice, but if you have a few bucks lying around, down is much more compressible and lighter. Even a down vest and a thermal undershirt will likely be warm enough in July. You can always jump in the sleeping bag if it isn’t.
Good luck on your gear adventure!
Matt