Hi I am needing to buy a copy of windows for my new PC.

Just installed a SSD and currently running windows 8 Release Preview.

I was wanting to get the retail copy of windows 8 so i have no issues with upgrades.

seen there is no retail version should i just get the windows 8 PRO OEM $229 from CL or get the windows 7 PRO OEM $209 from CL with a upgrade to windows 8 Pro for $20.

I like the win 7 and 8 option cause then i have the option to go back to 7 if 8 is lacking ( I have been using windows 8 since consumer preview as my only install and other then driver issues had no problems.

My most preferred option is if when the preview ends i can just input a key for my current install and not have to redo it all. (thought the actual install only took approx 10min downloading and installing drivers took a couple of evenings.

Thanks 
-Alex