Blah lol, ive only heard good things about clarke so far!,
i asked about the 255te clarke on another forum and i got this answer

CLARKE 255TE is a cracker, same machine as the famous American 'Miller' machine with cast aluminium geared wire feed, large smoothing capacitor bank for outstanding smooth arc characteristics & overall GREAT value for money

i think i will go for the clarke, but if not, a sealey would be a good choice going by that!
Thanks