I like this one => not yet beta but it works pretty well:
- I'm using it a lot.
The weekly builds already do some cool tricks like private session data in different tabs/windows. And yes resolving IDNs is on the roadmap - the developers have been asked about this and they acknowledge the need for it and promise it's coming. I plan to hold their feet to the fire.
One thing tho, it's not yet useful for website development as there's no inspector/firebug or similar.