I don't have either, but based on comments on this forum I would go for the Clarke. Send a PM to Weldequip on this forum - he is a Clarke agent and will probably beat MMs prices. He will definitely beat their levels of customer service and advice (I speak from experience on that one).
Me three! I started out with the old version of the Clarke 160. That's got a bottle shelf to attach a big gas bottle and a regulator too. Bottle shelf would be handy - no point paying for all those disposable bottles.