imho anyone who commutes to work only needs a pocket calculator to justify a new bike purchasewheelist said:Perhaps you could justify the expense of a new bike if you used it for commuting? It's a damn fine way to get some exercise in whilst not wasting too much extra time too.
If you're in the UK, then you could get your employer to take part in the Bike2Work scheme, and save yourself about 40% of the price of a new bike.
Wheelist