I own 2 WM bags. My first was a Sequoia GWS and I had it over-filled with a few extra ounces of down. It's a furnace and I've slept in it down to single digits very comfortably. I would buy another instantly if I lost it. Best money spent on any piece of gear ever in the history of the universe.
I bought a TerraLite a couple years ago and I'm also in love with it for moderately cool climates. I freely admit I'm a WM snob and that is NOT changing, lol.
Hey derland, check out moontrail right now they are having some fantastic deals on many pieces from Western mountaineering. Beware...don't go broke!
I bought two used for $400 from a guy. I almost fell over when I saw the price and I thought there was something up. Nope two amazing bags for $400. Sold my old marmot for $150. So for $250 I upgraded big time plus got a second bag. Best gear deal of my life. Everything about them is awesome.