Imho the best figure is Kanata by Azone. Well, technically it's a doll:
http://www.1999.co.jp/eng/10118082
There was also a figure from Kotobukiya of Kanata, but it was cancelled. Due to a number of reasons, probably: Sora no Woto failing to become more popular, the bad economy at the time, and the Dollar/Yen exchange rate strangling imports.
I have the cheap prize figures from Furyu, and I still like them a lot just because of how much I love the series.