I'm doing my first build from scratch and have some drivetrain questions. Here is what I am thinking:

Bike: Iro MarkVPro 56"
Sugino RD 165mm
Sugino 1/2 x 1/8" 130mm 48t Chainring
Sugino BB3 103mm
Izumi Eco Chain 1/8"
Using my old stock Kilo TT wheels for now

On Sheldon's site he says there is no real benefit of 1/8" chain over 3/32", is he just talking about conversions? Just confused on what's best.

If I wanted too could I go with the IRO BB with the RD's. I'm guessing not since they are 110mm.

Is it worth it to upgrade the cog and lockring from the Kilo wheels, thinking Surly cog and lockring.

The whole chainline thing is confusing me a bit, inside, outside, spacers etc... I'm reading as much as I can but just looking for a little guidance in general...

Thanks,