Federal A/t

[macca]

Just thought id ask you guys and gals in the uk what you think of Federal ms351 at tyres.I live in new zealand and can purchase some for $700 nz including a full wheel alinment which is alot cheaper than other at tryes.Do they perform well when compared to say bfg at's etc..?
Also what size would you recommend? my driving is split 50/50 on and off road. have got 30 9.5 15's and am wondering pros/cons of the 31 10.5's.
any comments muchly appreciated