Rae, I am also rather new to finches. I bought the first one about 2 mos ago. It was Zebra who I named Fiona. She almost instantly stole my heart so off to a pet store I went the very next week to buy more.
Last week when I was at a pet store I checked their finches. There was a small wicker basket in the cage and I could see 4 heads sticking out. LOL. They looked so darn cute!
I guess they like to be close to one another.
Wow, you are already thinking about the double-flight cage?
I am still waiting for the single flight HQ cage.
Once it arrives, I would love to add one more finch, but I am not sure which one yet. Gouldians are v. pretty but I have read that some have health problems.