I'm going to post all my domain costs as soon as I finish buying them. I plan to use the domains I don't use for this project as feeders for the main site. One or two might even be fit for a future niche link list.
Here are the registrars I would recommend:
Name Cheap
This is where I've been registering most my domains lately. Only $8.88 per (dot)com and they have a solid rep.
Direct Nic
15 bucks per (dot)com but perhaps the most solid rep around.
I wont recommend this one to you :
Godaddy
A lot of webmaster on this forum have had major problems with this registrar. This is why I wont recommend them. Personally, I've never had a problem, but this doesn't mean one isn't around the corner. I have MovieLinkList.com with Godaddy and I'm considering transfering it to name cheap or direct nic. Advice appreciated.