How do I keep Safari stable with 40-60 windows/tabs/sites open all at once?

Question

I have an iMac 2.66 GHz Intel Core i5 with 4 GB RAM running 10.6.4. One internal drive of 1TB half full and good external FW with plenty of room.
Recently, I have been needing to keep 60+ windows open (or tabs) in Safari. It's a long story… This has proven to be unstable and the browser locks up unpredictably.
Would adding more RAM help me keep MORE browser windows open and have better browser stability?
Firefox is OK but seems to have the same limits on number of windows. Actually, maybe less.
The web sites are a mix. Regular HTML, with Flash, PHP, the whole mix. Some sites require activity after X amount of time. The most unstable sites seem to be state and government sites. They are just not made for Mac or just stink.
Interestingly, by using Spaces - keeping about half the windows in one space and half the other (yes, it can be done!) Safari seems to last about 50% longer before becoming unstable. But I could be wrong or just lucky since using Spaces a week or so ago.
BTW: there is an extension called Auto Refresh for Safari that automatically refreshes pages. But I have not tried it yet. Not that it would solve this problem.

Answer 1

What about using multiple browsers simultaneously? IOW, instead of all 60 tabs in one program, open 30 in Safari and 30 in Firefox, for example. The one app may not have enough internal resources to handle that many tabs. So split them between different apps.
Me personally, some websites I only open in specific web browsers. For example, I open the Apple forums in Safari, but I open the VMware forums in Firefox. Each forum, I'll have multiple tabs open. (Not 60, but sometimes 15-20 tabs.) Although both are using Jive forum software, VMware's implementation has issues with Safari. Later, I found it was advantageous because now my "sites" were "organized" and viewing all the tabs related to one site was as simple as clicking on the Safari or Firefox icons in the Dock. And I do use Spaces, although not for organizing sites. For example, all the browsers go to Space 1, and Mail/iCal/Addressbook are in Space 4, so that I can leave multiple Mail messages open without cluttering the "web desktop". (Space 4 is pseudo-Outlook space.) So web apps to organize different websites, and Spaces to organize apps or tasks.
YMMV, of course. Just a thought.