Sorry for the issues with the gt500.. I do love mustangs and I traded off mine for the SHO. Just a 2011 v6 though (I was 19 haha, it was high class!)
Part of me really misses the mustang, and I plan on buying a 5.0 coyote in the spring and keeping the SHO also. The SHO is definitely not a direct replacement. It's unique in its own way, but it definitely doesn't replace that Mustang feeling. Something about a rear wheel drive car that just can't be replaced. AWD is wonderful if you're in bad weather a lot like me in northern MN, otherwise the awd system isn't all that sporty. Can't have too much fun with it asides from a straight line.
If you do decide to get a SHO I would definitely get the one you want. I had to drive 500 miles one way to get mine, but I'm happy I did! Didn't want to settle for a car that wasn't what I wanted. Unfortunately I couldn't find a PP edition anywhere so I got everything I wanted except that.
I guess I'd say if you're getting a SHO for a daily driver, go for it. If you have a daily and want the SHO for a weekend cruiser replacement for the gt500, I'd say you'll be missing that gt500 from the first pedal stomp. Just my 2 cents! Not trying to diss the SHO as I love mine, but like I said, it's not a direct mustang replacement, especially a gt500. You could be like my neighbor and have a 750hp gt500 and a stock SHO for a daily