Good idea. In 2006 I got a then-new Cervelo Dual as my last race bike, still riding it today and don't feel I am slowed down by the bike..
I like Dan's idea, the Caledonia is right in that sweet spot. That price is really tempting. I blew my discretionary spending on a new canoe this year though, will have to wait a bit..

in the high dry CO air, it's about five years between cable/housing replacements on my primary road bike. The MTB is on original cables from 2010..
For a race bike though I'd prefer electronic shifting for the reasons already mentioned - faster shifts, more accurate and less effort, better aero due to all the missing cables.