I like Big Agnes
sleeping bags. They aren't cheap but they are top quality. I used to buy bargain basement camping equipment but had enough issues over the years I finally saved up for top quality gear. Rule #1: You generally get what you pay for and camping equipment is no exception.
They have both synthetic and down filled bags plus designs for big & tall folks. I am broad shouldered and have size 13 feet. Many sleeping bags fit me like a strait jacket and my feet often felt cramped, especially in mummy style bags. The Big Agnes "Parks" series solved that problem for me. I live in Seattle and I have used down bags with no problems in wet environments but I make sure the gear stays dry. Dry bags for hauling and a very good tent. Down bags will be 40%-50% lighter and smaller when compressed than an equivalent thermal rated synthetic bag. So if small and light is important down rules.
I have a Summit Park down filled bag and the 25" wide insulated core inflatable pad. Both are rated to 15 degrees F. Their pads and bags are designed as a system. There is no insulation in the bottom side of the bag. Any insulation on the bottom gets crushed anyway so it will loose most of it's insulating value. The pads fit into a compartment in the bottom side of the bag and the pad provides the insulation on the bottom. That is why both their bags and pads have thermal ratings.
The suggestion of a silk liner is right on. A silk liner can add 10 degrees to the thermal rating of a sleeping bag but can also help cool you down in hot weather. I have tried flannel, cotton and synthetic liners but silk are the best. In warm weather I can often just use the silk liner on top of my pad.
For a good tent I like Big Agnes or MSR
. I have an MSR Superfusion tent, an Explore Series model that is no longer made. I got a great deal on it off eBay so that was a major factor in going that route over a Big Agnes tent. It is a four season three person tent. It's not something I would hike with but I like the extra room when it is being carried by something other then my back. I prefer a tent with a large vestibule so I can keep all the wet stuff outside the tent but still have everything under cover. One of the important things that needs to be done when using down filled equipment but it is a good practice in general.
On a number of occasions I have accommodated companions whose Coleman, Eureka or other less expensive tents have suffered some kind of functional failure. Usually a broken rod but one tent had a major rip.
MSR also makes a lot of other high quality camping equipment. Their cookware, stoves and hydration gear are all top quality as are their tents and sleeping bags. There are other high quality equipment manufactures out there. Marmot
, Mountain Hardware
and Sierra Designs
come to mind. REI
markets products from just about all of them. Some of the REI branded equipment is pretty good and usually cheaper (See Rule #1) but better than the Coleman, Eureka and even less expensive crowd. You can often find good deals on top quality equipment on eBay or Craigslist. So you don't always have to pay premium prices.