If you can find an old Sierra Designs Clip Flashlight 3 you might really like it. It was around 5lbs and quite comfortable for two. For that matter the classic Eureka Timberline 2 is only 5lbs 13 oz, sleeps two comfortably and can be had on sale for under $100. I'd do some more looking, especially at REI clearance, Sierra Trading Post and Backcountry.com clearance for lighter weight alternatives that still have good space.