In same position as you, getting back into it after a very long lay off! I bought a Hobbywing 120amp V2.1 speedo for the same reason that you're looking it, very similar to the Speed Passion GT from what I can tell with a lower price, the programming card (which makes life so much easier) is cheap as chips too!
No problems at all so far and barely runs warm with a 7.5t motor. Easy to set up and change software on the ESC with your computer via the programming card as well, I'll admit some of the parameters on the more advanced modified profiles are above my head though
If you want a cheap yet sorted ESC you won't go wrong, certainly if you're getting back into it like I am.
Adam