If you have the option always go with the high magnification. There isn't a noticeable difference from 2 to 3 power on the low end. But a big difference in 10 to 15 on the high end.
I'm in the same boat as you, looking to get a hot tent this season. When out with Friends over the weekend and got to see both a sawtooth and a seek outside tent.
What brand of tent and stove did you use? I borrowed a buddies of mine this past weekend and feel in love. And now I'm in the market for one.
And congrats on the Elk.
Just got the SG 0° a few months ago. Finally got to try it out over the weekend. It did not disappoint. I'm 210lbs @ 5'11". Plenty of room, and stayed warm all night long.