I have a pair of Pentax XCF 10X50 and I love them. 6.5 deg field and during the day I do notice curvature for about a fifth the way in from the edge but I don't notice it at night star scanning. Lovely and comfortable to grip and not to heavy. I bought them for $199 from Cameral House.
Iddon won a pair of Celestron 10X50? at the QLD Astrofest. I managed to get them off him for about 15 sec
for a look. Clear and sharp to the edge. Great views.