I would bet that the onlyl companay still making cranks in the US are profile. They do come in chrome and will last a lifetime. I actually prefer chrome/polish over ano because cranks take a lot of wear and polish can be touched up, ano can't.
I believe you can also get the Truvative Holzfeller in polish.
Stay away from square taper, there is a reason it's almost dead.
Yeah retro is cool and all, but not THAT cool. White Industries has the worst website I have ever seen. It makes them look like they haven't produced a product in 5 years but for some odd reason they still have a floater site.
Yeah, that's my 1998 ARC. With the double, you can get away with some other options:
1. Friction thumb shifter (Paul's Thumbies would work with a barcon)
2. Standard trigger shifter with the derailleur limit screws set to only let you use two of the indexed slots.
Since I have only used the Middleburn Duo with an X.0 grip shifter, I am not certain whether the spacing between the rings is the same as that on a standard mountain triple, but I would be surprised if it was different.
There's another local here that put a Duo setup on a custom Bilenky hardtail. He's running XT shifters and we are both running a 42/29 ring combo.