+1.Definitely this, dont install too many Firefox plugins though unless you upgrade the RAM.
I'd reccomend getting a second 6 core CPU and 128gb RAM if you intend to use flash
you will need a Dell PowerEdge R900 with dual 6-core CPUs, and 128Gb of DDR3, with a load of SAS drives to get a decent browsing speed, I recommend IE 6 as well.
edit, looks like i wasn't the only one with a 12 core 128gb monster idea for this![]()