MFarguharson,
Basically, sit back and don't get in a hurry to buy something right now. You have made the first move by joining here and asking. Research this site for a month or two, do some searches from the "search forums" feature about things. Give it some time to figure out what all the abreviations in members sigs mean. What you find is that there are a lot of parts that DO work well together even if they come in two boxes from two companies.
Banks makes the average TV and magazine viewer think they are the only good diesel company out there that is safe to your truck, there are others and cheaper.
Good luck.