I am pretty much the same weight and height as you and I had a regular wide 20 deg. I am a side and stomach sleeper as well. I personally couldn't do the whole mummy bag thing, the hood kills it for me, I typically don't sleep with my arms down at my sides and there is no way to put them up above my head with the hood. Therefore i parted ways with my slick bag...it was a sad day as i really wanted to like the bag. I am awaiting the back country bodybag that Kifaru is working on, and also looking into an EE apex quilt as options. I did use the slick bag down into the low thirties with no issue on warmth. During september in colorado high country chasing elk i used a woobie which worked great and was plenty warm for me down into the 40’s sleeping under a supertarp with no annex. That was some of the best back country sleep i have ever got. The other bag that i really liked but sold for a slick bag was the sierra designs back country bed...only downside in my opinion was that it was down insulation...i never had an issue with it getting wet but it was always in the back of my mind. That bag was great for side and stomach sleeper and the quilt system on it worked great!
Matt
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