I've been playing around with Safari 4 and I really like it. It handles AJAX websites such as facebook really well and the rendering is a lot better than Firefox's.

My only complaint is that there isn't an equivalent of Adblock Plus for it. I can't stand to surf the internet with all of the advertisements that adblock plus removes.

Does anyone know of a program that does this?

http://burgersoftware.com/en/safariadblock

Google comes up with that, but running Safari in 64bit mode is what makes it run so well.
I've also heard of a program that updates the hosts files on computers to block ads for every browser on a computer.

__________________
-Typos courtesy of my mobile phone.

For mac or PC?

For mac, there is stuff like this available:

http://www.versiontracker.com/dyn/moreinfo/macosx/10972609

I keep forgetting that Safari was released for windows. I own a Macbook Pro and i run OSX.

I've installed the application I have listed and it does what I want, but I'm a bit disappointed that i have to run it in 32bit mode.

__________________
-Typos courtesy of my mobile phone.

I haven't really seen much difference between 32 and 64 on mine. Unless you are talking about a really processor intensive applications, I don't think it matters. I just leave my MBP in 32 bit mode so I don't have to worry about compatibility.