Swick, I agree with you about the importance of using EV/EBITDA multiples when looking at relative valuations, but I think you have one part backward:
So one would subtract debt from enterprise value, because it is the debtholder’s claim on the business. You would add cash on the company’s balance sheet, because it is a non-operating asset and is not generating earnings that are included in EBITDA.
Its actually the opposite. EV = market cap + debt - cash.
EV/EBITDA values are sometimes better than straight PE because of non-cash expenses that can hurt GAAP earnings results of companies that use stock options, acquire intangible assets, or require lots of plant and equipment and must depreciate those assets.