Join Date: Apr 2009
Bikes: 2013 Fuji Altamira 1.0//2006 CAAD8
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S3 or 953 would be overkill, especially if your looking to build a track frame for the road - you wouldn't even want to use it on the velo either.
S3 and 953 are for the most part strictly custom at this point, as they are very labor intensive to work with. A friend showed me a site where you can get a road frame (not track) in S3 for a little over a grand, but I forget what it was.
If your looking for something that rides wonderfully, look for a used NJS bike off NJS Export. Soma Rush's are made of Tange Prestige, which is very nice tubing. Either that or snag yourself a used vintage track frame made of Columbus tubing or some other high quality tubing off Ebay.
In all seriousness though, a frame's geometry and build quality will have way more effect on the ride of the bike (assuming your using at least cromoly) than the tubing, and in my opinion a solidly built wheelset will make the ride way more snappier and fast. Ditch the deep v's and find some super light rims, like the kinlin xr-200's (lighter than mavic open pro's), and some DT Revolution spokes. Lace em to whatever hub you want (hub weight means nothing as long as it spins smooth) and you've got yourself some fast wheels.
This will be a far better investment than some fancy tubed bike. You just don't need very high quality tubing for shredding the streets. You want something that will be stiff and take a beating - Cro-moly is perfect for this. The nicer tubings will ride beautifully and be lighter, but unless your racing or doing centuries, your really not going to benefit from this.