I have two conures.One greencheek and one sun conure. They are awesome birds and will be your best friend for life. I wouldnt recommend Sun conures unless you can handle loud noises but the greencheeks are relatively quiet. Mine can fly around but I dont let her on the floor at all. If she gets on it I pick her back up, but we have small dogs and its too dangerous on the floor, she could get stepped on.
I hope it works out for you. One thing I would advise that I didnt do with mine and wish I had. Make sure you train her to play in her cage by herself. Mine is super clingy and has a hard time being in her cage and entertaining herself. But she likes those shreddable type toys the best. My sun prefers the toys with bells.
They both love rope perches, best investment ever.
May I suggest a few sites, this one is the best ever for parrot lovers, good people, good advise.
http://forums.avianavenue.com/index.php
and for toys and food
http://www.mysafebirdstore.com/
Also ebay and amazon.com sell big flight cages for very reasonable.