Bowen is a class act. Don't know much about his production staff. He's always been very high priced. I'd check into that, and see if you can get what you want for a reasonable price.
Don't know if he does his own work.
Reeder? Hang out at his website forum, ask him questions, get the feedback from his guys.
My understanding is Reeder's specialty are the laser engravings, and bluing. So, whatever you do, don't insult his rather 'unique' engravings.
He has a huge shop, and does a lot of guns. Go into the forum, and ask Gary if he actually works on guns, other then those two areas. I could be wrong...
That said, you might consider Jack Huntington Advanced Gunsmithing. Jack works on guns, and, all he's EVER wanted in life is to be a gunsmith. He's got another couple guys, Sean for rifles, and Jason is a fantastic pistolsmith.
Jack designed the .500JRH to fit in a FA 83, and, he cut the rim down on the .475 Linebaugh so it fit in the FA 83.
He also does conversions for a reasonable price, on the FA 83.
For a long time, Bowen wouldn't work on FA 83's.
Here are a couple of Jack's customs: