but those are not your only choices.
i was in the same situation last year. and, like you, i was looking primarily at very popular bikes, those 2 included. oh, and my wife is wonderful too.... particularly when she agreed for me to even think about that purchase. anyway..... do yourself a favor and consider having a custom steel ride built! especially, if you are doing long distance rides, and even more especially if you are planning on doing a marathon right off the bike. they are not as expensive as you might think, and actually, at $2,500, you can end up way beyond the bikes you are looking at.
you may or may not be familiar with landshark. john slawta builds them custom, only about 200 per year. i got my landshark last fall, and it is a true magic carpet. you can have a custom built and custom painted (your choice) with full ultegra built for 1,995 - with shim wh-r540 wheels. upgrade anything at great prices. i ended up with FULL record 10sp, campy racing wheels, and ouzo pro forks for 3k even. everything built to your custom measurements. if you wanted a slightly forward geometry because of dual-purpose, he can do that. andy hamsten won the giro riding a landshark. they are filet brazed welding, so nice, all my welds look like it's out of a carbon mold. 2 weeks ago, at a road race, a cat1 racer double takes at my bike and says "wow... a landshark... very nice". not quite mainstream.... but i counts when it needs to, particularly at the end of 112 miles. there are other custom steels to look at - waterford, seven..... but i really feel i ended up with better quality at a fraction of the price.
check out the dealer:
www.gvhbikes.com gary hobbs is GREAT to deal with.
check out landshark:
www.landsharkbicycles.com
It's not easy to juggle a pregnant wife and a troubled child, but somehow I managed to squeeze in 8 hours of TV a day - Homer Simpson