Medium(Pooled) vs. High(Isolated) -> App Protection

Fellow IIS GURUS,

I am trying to deploy several ASP.NET Applications on the same IIS 5.1 server and I am running into some design/architectural
considerations. I am trying to understand the trade-offs between running apps inside of the same aspnet_wp.exe (Pooled) versus
having each app run in a seperate (Isolated) process. I recognize that when 10+ apps run in the same process in Development,
sometimes the Web Server IIS Admin process hangs. Has anyone else come across this type of behavior? I am trying to roll out
several apps to a Production Web Server over the weekend and need to make a final decision between Pooled and Isolated
Application Protection Settings. Any insight, advantages, disadvantages, horror stories, etc you can provide for either setting would be greatful.

Thanks.

- WP