ME, you're on the right track. I really like Phong's stuff, and would have gone that route but a very reliable and knowledgeable member here happened to have a MQ case for sale, and he'd already gone through the heartbreak of making sure it was all correct. MQ cases look like old pieces that have accumulated damage, then have been meticulously refinished to "bring them back to life". Under a loupe they're fantastic. Phone cases look like museum pieces. Perfect. Both have the correct dimenstional shape to the caseback. My MQ is also engraved with period-correct markings inside the caseback, with a serial number to match that date range.
For your crown you'll eventually go gen. The Phong crown is very nice, but it's nothing like a real crown. You can live with it, but you WILL go gen eventually. It's worth it.
CWP makes very good hands for the 6538, they're brass and they age to an almost matte finish that looks just like gold under a loupe.
As for dials, the ones you're describing are extremely high quality and are made only on genuine 6538 plates. They're also extremely expensive. I used an MQ dial in my build, and it was very good but when it arrived the 3:00 lume had fallen off. Instead of sending it back to MQ, I sent it off for refinishing by Big Dazza, and a relume at Ziggy's ... it's glorious. It's as close as you'll get to an uber-dial or a gen. It will also be for sale in the near future.... *cough*