As Tim said above, as all the events over 2007 average Storm II is probably in the top 5 robots in the UK. In opinion it is goes as follows.
1)Big Nipper
2)Thz
3)Tiberious 4
4)StormII
5)Envy / Kronic (cant decide - Evny has been very much improved over the year, Kronic has had its problems but generally solid)

Maybe slightly different if I spent more time on it. So sorry if ive missed someone obvious off my list. This is just from 2007 obviously.