I use anything and everything. I use high quality bits when the project or series of projects demands it and I use budget bits, when I'll only use them lightly for a few projects. I find that budget bits usually do passable work when new, but lose their edge far more quickly than higher quality bits.
I love Wealden--I think they are the best quality for price cutters in the U.K.
I also am happy with CMT, Trend (but they are overpriced for their quality), Perform, Eagle America, Pricecutter and Blue Tornado.
I also have a number of budget bits that came with various budget routers and ones which were purchased for single projects. They get chucked as soon as they start to lose their edge.
Jason B., and Tim,
I only have a cabinet door set from Blue Tornado, not the set you mention. But I am very happy with their quality, especially at the price. As far as Rutland's claim about Blue Tornado being North America's top seller--I am very dubious. I am American, and never heard of them until Rutland's started selling them. Also, my Dad's been woodworking in America for 50 years, and never heard of them. I have been able to track them down. They are made in Tennessee, and seem to be relative newcomers; for what it's worth. P.S. I know Rutland's just calls them Tornado, but the brand is Blue Tornado.
Brad
Edit: When I first wrote this, Blue Tornado had a website which seemed to indicate that they were made in Tennessee. I've since found out that they are made by Valuemax Tools in China. But they are made to high European and North American standards, unlike some of the budget Chinese ones.