It is absolutely worth the investment. Tubulars are great but they are a pain you do not want to deal with if commuting.

You can find something used on craigslist or you can shop around online. You will first want to measure the rear drop outs to see what will fit. This is an older bike and so finding a wheelset will take a bit more time.

Once you buy the bike, measure the rear drop outs and start a thread here; you'll get some advice on how best to proceed.