Unfortunately I don't think Evans qualifies as a local bike shop any more. One of the advantages of getting your bike built up by a truly local shop like Paul Hewitt is that you can specify exactly which components you want right down to the bar tape and bottle cage.
Having said that I wouldn't worry too much. You seem to be enjoying the bike and I don't suppose that the difference between the two cranksets is really that great - though I am sure a Compag expert will be on in a minute to tell me how wrong I am.
Having said that I wouldn't worry too much. You seem to be enjoying the bike and I don't suppose that the difference between the two cranksets is really that great - though I am sure a Compag expert will be on in a minute to tell me how wrong I am.