Damn... I hate grinding... it's SO boring.
This is the worst part of the game (A-Spec grinding).
I hope there will be new seasonals soon...
I'm still looking for the besy way to grind my Lvl 40 A-Spec, so let me know how you do that!
EDIT: According the GT5 Matrix... The latest Seasonals are a good way to grind.
Online A-Spec Challenge #1
High Speed Ring (PP400) 44,800 XP // 4m05s // 10,971 XP/min
Trial Mountain (PP500) 66,600 XP // 7m30s // 8,880 XP/min
Grand Valley Speedway (PP650) 110,000 XP // 8m15s // 13,253 XP/min