Remember... I am the one that is new to pretty much anything pre-1980!
Pete, why not look out for some proper romantic comedies? There's some good movies in that list, but nothing great. Get The Philadelphia Story or The Apartment or Adam's Rib or anything by Preston Sturges, like Sullivan's Travels. Do it properly, man!
Jon... Take pity on me man! Remember... I am the one that is new to pretty much anything pre-1980! So I can only go by what people suggest to me for those (that and them being cheap enough for me to purchase).
:p I would class Bewitched as a romantic comedyother films id recommend are Bridget Jones Diary, Jerry Maguire, Knocked Up, Annie Hall, 10 Things I hate About You and His Girl Friday