How long to wait before 301 redirect?

I have found an expired domain that is really close to my niche.
Having a TF30, and 80 live and clean backlinks.

I decided to redirect it to my site. Whats the bast way to do it?

I tought that redirecting a live site would be much better, than redirecting just a dead domain.
So i had fired up the site a week ago, and recreated all the backlinked pages with content.
(Also created sites for my money keywords)

Now every page is indexed in google, and site is started to rank pretty well.
Is there a point in waiting for the best positions before redirection to my money site?
Or just make the 301 right now, migrate the backlinked pages, and go for a beer?

dont wait direct redirect

If all pages are already indexed, you can do the 301 immediately after.