I agree that white would look better, but the turquoise doesn't look bad either.
Something to consider with flipping the exhaust. I didn't look back through your complete thread so I'm assuming you have a center dump or cut down 6bt. Your clearance on your intake to oil filter and alternator will become an issue. A rear dump might suit you better if you have the exhaust clearance. Personally I like where she sits now, but if you upgrade the turbo and injectors you might have to consider 2 things.
1. the compressor housing is going to be a bit bigger. Probably a non issue.
2. if you hop her up to much you will have to consider room for inter/after, air to air, water to air cooler and all related plumbing or end up driving by the pyro.
She doesn't look like you'll be using her for much towing and you might not have anything to worry about but before making any of these moves you might want to do some research and or consult some of these guys here that know a lot more than "Shadetree AL"
Your truck is simply beautiful. Does it have a wood slat bed?
I too am waiting patiently on my painter. It's like watching the grass grow.