24 oz for a tent! That's awesome! I have the Big Agnes Copper Spur UL1, one of the lightest tents, and it's a full ten ounces heavier! That's significant.
I have an Osprey Atmos 50AG, and it's awesome. I carried it up and over Algonquin, on to Iroquois and down to Lake Colden one day. I learned: set up camp somewhere lower and do day trips to summits. I also learned that even at the point of total exhaustion, this bag didn't hurt my shoulders or back. Like you said, Osprey is an obvious choice (I followed the crowds), but they're one of the obvious ones for good reasons.
Do you do any trail running? I haven't but have been thinking about trying it this summer. I think it might be a good middle ground between street running and hiking.
What are your thoughts on sleeping pads? I have one, and it's comfortable enough, but it seems really bulky.