And that swap could make you money if you sell the new STI. Black brooks would be a near straight across moneywise and the chainring could be kept for backup or sold its not a huge deal either way. I can get just the frame (I don't think it includes headset or fork) for about $270. (even with the discount the caad frames are like 500-1200 smackers)

So lets see what this adds up to
barends $40
bb $25
crank used $40
all four cables $10
stem and handle bar $70
headset $75
wheels $200
cassette $30
derailers $60
brakes and levers $100
chain $15
tires $30
seat $50
seat post used old steel $5
Forks $80

for a total cost of $830 components and $270 frame for a grand total of $1100
now if I did the swap meet, ebay, closeout sale, thriftstore bicycle cannibalism thing I could get that down to maybe 650 but thats not exactly shiny and new. (though with careful used part scrutiny, perfectly functional)