I know this will go against the culture of the above but there are things to compromise on and things not to. Start up costs can be steep, if you have the resources, there is no substitute for quality. I have gone the Nashbar route with panniers. The price is attractive but the quality is not always up to snuff. Others have had no problems but I did. Being on a four month tour and having to use duct tape to secure the rear bag, to your bike, is not a good thing. I'd go with Ortlieb or Arkel. (I like Ortlieb because they are waterproof and durable) On racks, I like Tubus. They are light weight, chromoly, and very durable. In general, if you purchase a tent, get the best lightweight one you can afford. There is nothing worse than having and inch of water, on the floor of your tent. I would get a good sleeping pad 1"1/2 to 2" thickness, I use a Therm a Rest. Sleeping bag, depending on the time of year you travel, I would again purchase one that is light weight, the size that fits you, and durable. (Kelty is a good one like they have in the ACA store) A sleeping bag liner may get you through the cold times at altitude. Look at it as an investment, one that will last you for many years if you maintain and take care of it. If you look at the cost over a 5 to 10 year period, it will not be all that bad. It is better to do it right the first time, have fewer problems, than to have to focus your energy on fixing things or that you are not not happy with your choices. When I tour I want to have the best chance to enjoy it and having peace of mind and knowing I can rely on my equipment is important to me.