Welcome to WebmasterWorld Guest from 126.96.36.199
www.speednames.com or www.netnames.com
unfortunately I can NOT find any cheap and cheerful registrars, but only 2 reputable companies.
actually a good choice for .it domains would be:
www.livetodot.com or www.bb-online.co.uk/italydomain.html
I have no experience with Netnames, other than that I think they have a nice site. Another one that pops my mind is CommWorld Domains. They're backed up by a consortium of 18 European Advertising Agencies. Their site is at: [commworlddomains.com...]
They're very flexible.
Maybe that helps.