You can't go wrong with TNF, Marmot, or MHW. As I posted in another thread, I also love Big Agnes bags and sleeping pads. I have a TNF bag that's 12 years and still awesome. I slept in it almost every weekend this summer and it still feels like its almost new. TNF's quality did deteriorate in the late 90's but they've made a lot of changes and things have come back around to the good old stuff of yesteryear.
If you want to know that you will be dry, be sure to invest in a waterproof stuff-sack that's big enough to hold your bag. Get a really good one. If it's pouring rain, you can set your tent up and then carry your stuff-sack into your tent and remove its dry contents out of reach of the elements. Worth its weight in gold. I also used them in the Army to store my extra clothing so that they would stay dry in the shitty TA-50 issue bag.
Finally, invest in some good polypro. Arc'teryx makes the best. Patagonia's design has gone to hell, IMHO. MHW and TNF probably have some good options in this area if you can't afford Arc'teryx.