Which is better for running multiple apps for intense usage of business applications on a dual monitored desktop PC. The AMD Tri Core Phenom at 2.1 Ghz or the AMD X2 Dual Core 6400 at 3.2 Ghz? We use Word, Excel, Nuance Dragon Naturally Speaking, PaperPort, a proprietory data base, Adobe Acrobat, etc, all running at once.