I am having a confusion which domain to go with.
domain or www.domain
I dont care about the redirections between each other. I would like to know which one is better in any ways.
Update: Greg's links below have very useful info. Must visit.
It doesn't matter for SEO. The most important thing that you will always redirect to one and only instance so crawler bots won't count by mistake www.a.com/index.html and a.com/index.html as double content even though modern bots can detect it is the same site and the same page of it. Without www. it is easier for user to write in address bar and easier to remember. I would go for a.com instead of www.a.com. Once you add both to your server, make proper redirection using IIS proper settings or .htaccess file on Apache. Afterwards add website to Google Webmaster tools and other common web analysis systems while it is important to set default domain in there. Set it without www. !
Good luck