I tried Safari 4 for a couple minutes, but even though it hasn't been actively developed in many a moon OmniWeb is still way ahead. The things I can't give up:
- Ad blocking: (Ok, I could duplicate that with Privoxy so it isn't a deal-breaker.)
- Shortcuts.
- Superior RSS reader.
- Site preferences w/browser spoofing.
Without these any other browser seems crippled. Safari 4 may process JavaScript four times faster than OW (according to SunSpider on my machine) but that doesn't make up for what it lacks.