The T1 is a standard shaft and will only fit standard blades while the 11K is a tapered shaft and will only fit tapered blades. I've heard that the 11K plays stiffer than rated, so you might have to drop down a flex rating.
The T90 is an excellent stick for the price.
Curve preference is up to you. Why not buy a bunch of cheap wood blades and try different curves on them? Easton offers both tapered and standard wood blades in various patterns.
What's your budget, height, playing level, and why do you want to try a different blade?
I don't want to spend more than $150.
I play either right or left wing and use mostly wristers and snappers.
Mostly house league/beer leagues.
The coffey blade does not allow for me to dangle that much and I can't elevate my backhanded shot
I would try a P88 variant. It's a little smaller than the Coffey but still a slightly open mid curve.
For performance, the Bauer Vapor 2-piece and the Warrior Dynasty 2-piece would be the top of my list. My main stick is a Vapor X60 and it's been amazing. Just got a Dynasty this week so don't know how the new blade is but the old Dolomite 2-pieces were pretty good.
For durability, the Harrow 300 is great and cheaper but it's a little heavier than the above sticks. Base I have only tested not owned but it should be somewhere between the Harrow and high end sticks.
I don't trust Easton in terms of blade durability and wasn't a fan of the Reebok sticks I used.
I just got the T90 and have been happy with it so far. We will see how the long term durability is, but it is light for its price range and seems to have a decent enough balance (obviously will be a bit blade heavy compared to the top of the line).