I got myself a 200 a couple of months ago and have been very pleased with it. I have just got back from a trip to Arctic with it and it performed really well. Its a good size for me and the most comfortable rucksack I have, its also got a very useful range of pockets etc. I would say that if its the right size for you consider it a strong contender. I managed to get in mine the following:
Canon EOS 5D, 20D & 3
Sigma 500 f4.5
Canon 100-400 L
Canon 24-105 L
Flashtrax
20 rolls of velvia
And a pair of 8x 40 binoculars!