My personal fav is a AEM tru boost controller, I've had nothing but good experiences with these, and they double up as a gauge. The only down side is that the numbers are hard to read sometimes during the day. And did I mention how simple they are to change the boost on, hit the left button to lower the boost, and the right one to increase it. Just don't get out of hand or you'll be in real trouble.

Now the debate over what is better as far as manual VS electronic is never ending. Personally I like electronic, it's a little more work to install if you dislike electrical, but at the touch of a button you have control over your boost, and theres no guess work on what boost your going to be running. Manuals on the other hand work fine and can be made for under 20 bucks, most of the toyota MR2 guys use them at 15 PSI and just run that all day long. Just turn the boost up a little at a time when installing a MBC (manual boost controller)
How to make a MBC