I am no expert but mr twoKiwis is 6ft 1", and about the same weight as you, naked. He bought 198cm Volkl G31 and loves them, but wishes he had bought them shorter. He is trialling a shorter pair of the same skis, 188cm, this weekend (we have snow down under) so will be interesting to see what he thinks.
Both of us did not go short enough when we bought shaped skis. I am on 177cm Bandit X's and am only 5ft 4", I should be on 168cm. Previously I was on 190cm, so thought I had come down enough when going shaped. The extra length is fine in NZ because all our slopes are wide open bowls, can't get into too much trouble with longer turns. But I found it difficult to turn my bandits quick enough last time I skiied the trees in Canada - I am not blaming the ski totally - but it would have helped.