Your Miche track hubs are probably worth more than my whole fixed gear. It sounds like you want to do it right i.e. you got the money.
-I would definately go with a 1/8" drive.
-You need to decide what type of frame you want track, road whatever. Just make sure the drop outs are either track or horizontal.
-To do it right I would get some track cranks. You can also go with road cranks, but the chain line might need to be adjusted.
Read about fixed on the web. There are lots of sites out there to help you out!!!
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