Marmot Trestles Elite Eco 30 vs Sierra Designs Shut Eye 20

[DustinKW]

So I live about a hour south of Bakersfield up in the mountians and am trying to get some gear for overnight camping. It rarley gets below 30 degrees during deer season and i was wondering if the marmot would be good enough or if i should get a 20 degree bag. I found the seirra on amazon for 80 vs the marmot on optics planet for 125. IMO the marmot is way more popular and probably more quality but wont be as warm. Thanks in advance for any thoughts or opinions.