From what Jim is saying as far as running Sonar,
Home Premium runs supporting upto 16GB on Memory, thats the max I can do with my system so no need to go higher. For Sonar I wouldnt benefit a bit to go outside of Home Premium so why spand the cash.
Sonar is all I do on this system outside of going online to CAKEWALK to download updates/patches and sometimes I do that with a flash drive off of my laptop so really I could yank the WIFI card and eliminate that problem all together LOL
But anyway, thats what I have gathered as far as operating systems between Home Prem, Pro and Ulimate and its benefits running Sonar