Apple launches Safari 4 beta, but my browser portfolio is crowded

Apple said Tuesday it has launched its Safari 4 beta with a JavaScript engine dubbed "Nitro" that the company claims is "the world’s fastest and most innovative web browser."

The early reviews are strong for Safari (Techmeme), but it's questionable whether there's enough there to lure folks beyond the Apple base. Just the history search and cover flow feature will probably get me to download. Will I use Safari every day though?

Here's the problem: I already have too many browsers. On any given day, I have Firefox, IE and Chrome running. For various reasons I use three depending on the application I'm running. I use IE for financial stuff--streaming quotes, Wall Street research and the like. Chrome works best with the version of WordPress I use. And Firefox is my multipurpose browser. Frankly, Safari may have to cure cancer to get into the mix. 

Apple in a statement outlined some of the new features:

• The Nitro JavaScript engine executes JavaScript up to 30 times faster than IE 7 and three times faster than Firefox 3 (I haven't verified these claims yet). 
• Safari 4 includes something "Top Sites," a display of frequently visited pages that's allegedly "stunning," according to Apple. 
• History search with complete text of viewed pages.
• Cover Flow, which mimics iTunes when searching for bookmarks.
• Tabs on top like Chrome has.