Thats good the baby is weaned.
I have got to say, adding a second for me was the best thing Ive ever done, even though my younger two have jelousy issues at the moment I wouldnt change a thing!
I hope you do what is right for you, a new addition would be great but i just wanted to let you know it can go either way.
They are all great company for each other, mine each have their own cage but they are in the same room and talk away to each other all day long.
Please let us know what you decide.
Caroline.