I agree with Sandeep at the invitation of hearing from others about servers. I appreciated your posts -- do not feel at though I am attacking you, but I do have some questions so that others may benefit.
I am confused as to why you had a P2P environment which was working fine, and you upgraded to a "standard version -- much more difficult to implement. Yes, Remote Work Access which allows one to set up their own Remote Web Workspace is nice, but I would hardly find it a reason to switch. It isn't terminal server. RDC would do the same without the bells and whistles.
There is no mention of SharePoint or Exchange Server. And, both are transparent, e.g. if you installed using the wizards, Exchange is not hard at all. You can set it up with your ISP and the POP3 Connector and be all set. I would love to see P2P rival Exchange on simplicity. With P2P each computer must set up its connections. With SBS, simply open up Outlook and it automatically configures it. It's actually quite fun to watch. And, now that you are "stuck" with SharePoint, you can see how nice it is.
I think you will find it takes no less time to manage it. There is nothing to manage. You just leave it alone, and it will email you daily that it is working correctly. Once DHCP (hopefully on) and DNS are set there is nothing to but gain the functionality of SBS...single sign on and the rest.
I can understand looking only at AC, but I always wonder why people don't look at the many other advantages that a server offers.
I would suggest 6GB to 8GB on the main computer if you have 64-bit. This will keep you from having issues with too little RAM when SQL takes it, but with 64-bit, you would use at 4GB, so that would probably get you by.
I always like to quote my networking guy with 35 years of Microsoft networking experience. As a MCITP, I ask him why he never works on P2P. His answer, "They are way too difficult to work on."
Caveat: I am only writing this in response to the above posts.
