I generally love Evans products, I normally use Evans G2 coated or clear heads on the top of my toms and I love the way they sound - I'm a huge fan of Dennis Chambers and I changed to Evans when I found out that's what he uses!
I have slight reservations about the torque key though. If some of your tuning bolts are sticking in the lugs due to lack of lubrication and some are not, (I often have to tune poorly maintained kits at rehearsal rooms / venues that supply the backline and sometimes tuning bolts are siezed into the lug!

) you might find that the key reaches its torque setting on some bolts before others regardless of how much tension they are applying to the drum head, if they are sticking. The Tama tension watch is probably more effective because it actually measures the tension on the drum head rather than the torque on the tuning bolts, but it's quite pricy!
The torque key should work fine if you keep you tuning lugs greased and your bearing edges waxed (a candle should do the trick) so the the head slides over the bearing edge evenly all around the drum, and none of the tuning bolts are stuck or siezed!
I prefer to use my ears and a normal drum key to tune my kit though!