Adam's all the way-I like it so much I give a full detail kit away with every car I sell. I too have tried them all and I also used to own a high end detail shop. Nothing is as easy or safe for your paint as Adams.
Remember, Meguiars may have the market cornered but they also engineer their products to a (low) price point for market share. Think Wal Mart, Autozone, etc- it's all about PROFIT MARGINS with the commonly available detailing products. Another little tip-if you insist on using Meguiars, ONLY buy the stuff in the tan bottles. That is their "professional" line, all the "NXT" and similar stuff in bright shiny bottles is for K Mart and the like. If in doubt, go to an auto body paint store rather than your local mega center.
That, or,
www.adamspolishes.com - they will ship to your door. Not cheap, but neither are our cars. Call and talk to Adam or Heather and tell them I sent you, they'll give you 10% off. Make sure to get his detail spray, butter wax, and brilliance...and some of their awesome microfiber polishing and drying towels. If you don't like the stuff they'll give you your money back plus 10 points. Trust me, worth the call. Just ask Sixtiesmuscle, Bruce, Richard, etc- I've got them all hooked on the good stuff
Colin