I'm looking to replace my shitty fleece walmart sleeping bag with a decent one -- wanting something usable down to about 45, fairly lightweight, and ideally in the sub-200 range. Best I've found so far are the Kelty cosmic 40 or the Marmot always summer, but I'm wondering what youse guys use in the warmer months.

Also sleeping bag general, post 'em if you've got 'em.