you can get your crit chance a bit higher than 55% through equipment and crit rune, but I agree with this calculation (by Huggles, posted here:

http://forums.nodiatis.com/forums/no...iscussion.html)

Melee:

Maxed Critical Strike: 75% chance to not occur

epic 99 legging: 98% x 75% = 73.5%

epic 99 legging again: x 98% = 72.03%

99 Epic Bow: x98% = 70.5894

Critical rune r5: 94% = 66.354036

Max 1H crit % shown above from here down, it is for 2H only

Two-handed maxed: x 60% = 39.8124216

So, reversed that would be 60.1875784% chance for a 2H melee crit, and a 33.645964% chance for a 1H/DW melee crit.