i just recently got the older orange KHS aerotrack with the sloping top tube. the geometry is super tight and it rides solid. but yeah i was totally in love with its predecessor with the curved seat tube. i actually test rode one (an even older one that had the blue finish), and the weird thing was that the top tube actually sloped upwards. the silver one is the bomb, though. i used to see a couple of them around in Boston when i lived there in 99.

i think the new filte 100s are pretty ugly. don't know much about them though.

how tall are you? there's an orange aerotrack one going on ebay...