490 defense and 102.4% I must confess I have never seen as optional values. If you wish to be considered a viable main tank I do feel quite strongly that these are must have values.
You can have lots of stamina but if you don't have the avoidance to back it up your well and truly catflap. Balance is the key, I know its difficult to get groups as PuGs without 14k health but long term uncrushability is far more important.
You will find, that once you get 102.4%, you seem to immediately go upto about 107% and can start dropping block rating straight away and you will wonder what all the fuss about getting to 102.4% was about.
If you want to be seriously considered as a main tank, do the work and then reap the rewards.
Barathorn
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'Don't mind Guillex, he thinks he's Dorvan' - Lore at his best March 2008.
http://armorylite.com/eu/Aerie+Peak/Barathorn