I'm going to launch a new site and I need some advices about the domain name. Is it better to register a new domain name (more brandable, easier to remember, medium long, premium) or use a 4 year old domain with PR3 (kinda short, but a little hard to remember). Both are well fitting domains and .com's. They got the same meaning but the old domain is a little shorter version of it, but the other domain is still not a long domain name. It's going to be a serious site and I'll spend time on it. Maybe I should start the site on the new domain and make the old one redirect to it or something? I need some advices. Thanks.