Without multi-quoting a variety of previous posts I'll do my best to adress eveyone whos commented.
1. Filing down the fork race was a joke. I'd never do suck a thing to a bike of this quality.
2. Mid-range. The Merckx Century TSX was mid level in Merckx's 91/92 lineup positioned between the Corsa and Corsa Extra. With a 1994 frameset MSRP of $1225 it was more than the $925 Corsa but less than the $1421 MX Leader.
3. No vintage looking headsets. The 600EX, VO headset and the Tange Sekai would look out of place in my opinion.
4. Headset hell. Without a doubt, finding 1" threaded headsets isnt as easy as it seems. There are alot of sub $20 heasdsets but almost nothing in the $20-$75 range. While headsets like the Ritchey may be heavy, the overall functioning quality is at least as good as Shimano 105 and I see no reason the its not equal to a 600 Ultegra. At 140g its only 60g (2oz.) heavier than an $80 Dura-Ace. They just look goofy with a black top cap.
5. Stack height. Anything under 40mm should be good to go.
I prefer to have consistency of componentry on all of my bikes. At the moment its looking like one of the previously mentioned Ultegras (which I happened to have missed in my initial ebay search) will be used.