Thinking of adding to the flock

I currently have one really old EE that last laid an egg more than a month ago. She got sick and has since recovered (mostly) but is not laying. She is in a pen by herself. I also have a blue cochin and a Gold Comet both of whom I am still waiting to start laying. I was told they were 18 weeks old when I got them and that was 5 weeks ago. Then I picked up 4 EE chicks (3 pullets and 1 roo who will be leaving us once he turns vocal). The chicks are approximately 8-9 weeks old.

While I am enjoying the chickens, I WANT EGGS!

So I am thinking about expanding the flock. I have a friend with one white chicken and 6 brown chickens who are laying about 5 eggs a day. I could adopt all of them.

Or I could shop out for breeds that I really want, knowing that it will be spring before I can get chicks from the local feed store. In Ontario, Canada there are fewer choices of where to get chicks from and since the lot I currently have all came from "Feather and Fur" swaps and not a one turned out to be the breed that was advertised, I am at a bit of a loss.

In an ideal world, I would be able to find 1 RIR, 1 BR and one chicken that lays a very dark egg....

Thoughts?