Keyless locksets tend to be boxy, but traditional styles do exist. What's more, you may be able to replace just the lock cylinder if your existing set is two pieces, like the one shown. Better-made sets have the heft of solid brass and the luminosity of a hand-polished finish. Details such as a discreet number pad and forged-brass trim may drive up the cost. Read the warranty; it may not cover the electronics for more than a year.