RE: Which ESC to buy for Tamiya Double Blaze................
An evx, KA-6, Novak super duty are all twin motor esc's that are probably overkill. Nearly any single motor esc can still power twin motors as long as the specs are up to par. You would simply y-connect the motors in parallel by using adapters/solder wires/or jumper wires.
The stock motors are 27 turns so a limit of 13.5 turns or lower is what you will need in a single esc rating. There are many with 0 limit, 8 turn, 10 turn 12 turn, and you can probably get away with a 14 or 15 turn limit if you want to push the limit and risk failure. I like using a cheap duratrax streak with a 12 turn limit and no reverse with the stock motors because it allows me to use up to 10 cells as well and really makes the stock motors come to life.