Best redirect method is?

Hi,

I have a question that has been rolling around in my brain to such an extent that every possible answer now seems plausible and possible. As that cannot be, here it is…

I’m thinking of setting up a domain as a redirect point. The new ‘A’ domain is there to redirect stuff to existing domain ‘B’. My query is about the best way of setting this up.
Here’s the background so you have more idea about the puzzle.

Traffic and links will be directed at the new site using keyword terms. They will then be redirected at the most appropriate pages of site B.

Okay, so the first question is, if I do this through a 301 redirect, does the link juice of a non-content related link (e.g. a social bookmark) stop at site A or does it pass straight through to site B.

Next, what’s the best way of setting this linking structure up?

As you can probably tell, this is getting very confusing…I’ve looked around to see what I can find for the past couple of days (not here I hasten to add) but it is all contradictory and therefore pretty unhelpful.

Anyone with expertise who can throw any light on this, please let me into the secret…

Thanks in advance,

Cheers,

Steve

PS. You’ve got to admit, it's a corker for my 400th post…