JCRAIG Acid 3 is not a "good browser test", it's simply a compatibility test for different web technologies and "standards", many of which aren't even in use in the real world. The best "good browser test" should be what works best for you, does it have the features that fill your needs, does it properly render the web pages you visit, does it fit with your work-flow, is it visually pleasing (if those things are important to you, as they seem to be for many Mac users). Try it for yourself and make your own decision, don't base it on the results of some test that you probably don't even understand.
(Version 2.0)