Thanks for all the replies guys, I shall take it all in to consideration as my driller is in Spain on 2 weeks holiday at the moment so I'm not in a rush to choose.
charlest..very informative thanks, as you say all bowling balls are more expensive over here and a new drilled legends ball will about $300-$350, so a used one would be great but as they are not popular there are no balls available, also because balls are so expensive in general (i.e. the price I've shown applies to most high end balls) most people take great care when buying new balls and tend to keep them for a long time so there is not the same sort of trade in second hand stuff as you get, if you were to check on ebay.co.uk you will only find 20-30 balls at any one time and good high end balls are rare and would go for about the same as you guys pay for a new ball.