My wife & I are planning a cross country tour next summer. We are hoping we can semi retire next summer. We currently ride a Merlin solis and a Trek 2200. We would like to buy top quality bikes to make the touring as enjoyable as possible. I've done some week long tours in the past. Multi-day touring will new to my wife. We live in southern Illinois. We are considering custom Merlins or Seven Vacanzas. How do I find out what brakes, wheels, shifters, tires etc. to put on the frames? Every bike shop recomends different parts. I am 58 and she's 56. Were in good condition. If we go top of the line, these could be the last bikes we will need.