Hey guys I'm considering buying a Trek FX and trying to pick between the 7.2, 7.3, and 7.4. My main concern at this point are the components. The 7.2 has Shimano Altus FD/Shifters and Alevio RD. Uncertain what type of crank, possibly Altus? 7.3 moves up to Acera front/Alevio rear and the 7.4 gets Acera front/Deore rear.

How reliable/durable are the components on the 7.2 versus the more expensive models?