Thanks all! It'll be used as a sleep cage, if the little one happens to be prone to night frights.
Also, 3/4" is okay for 'tiels? That certainly opens up my cage options, aha. I had always assumed it'd be large enough for a head to fit through, though looking at it now it's not much more than 5/8".
Thanks again! An incredibly helpful forum...I'll be sure to stick around.