All major browser have recently released their new version compatible with HTML 5 and loaded with many new features. I have IE 9, Firefox 4, Opera 11 and Chrome 10 browsers installed on my windows 7 64-bit. Google Chrome browser looks better than other browser in few aspects. I will not say, Google chrome is best modern browser, but it is certainly a better modern browser.
Chrome browser has smallest startup time. It is very light, and need very small time for startup.