Don’t look to large, well-known registrars. I would suggest that you look for local registrars in your area. The TLD registry for your country/area usually has a list of the authorized registrars, so you can simply search that for entities with a local address.
Disclaimer: I work at such a small registrar, but you are not in our target market.
> Pick them carefully, don’t skimp, and make sure they have good support. Because when things go pear-shaped, you really want to be able to actually talk to someone to change your web server or e-mail DNS records (or even DNS servers) to somewhere else.
> Big registrars can’t afford any support costs since they prefer to squeeze the price down as far as possible, and therefore they prefer to simply lose or outright drop any customer in case of any and all problems. Conversely, small registrars may charge more, but have better (i.e. actually existing, and sometimes even dedicated and personal) support for when things go wrong, and have a vested interest in keeping you as a customer.
> A small registrar might also be so small as to know you personally, which will help monumentally against any social engineering attacks.