i learned the hard way also though, and wish i would've just listened to the advice i got on here and from friends in the beginning. i ended up buying 3 total sets, because the first 2 royally sucked after a few times having to tear apart and rebuild trucks. i could've saved 40 bucks or more had i just bought good ones from the gate. you're going to need them for other stuff too at some point, so you might as well get good ones.
Arrma Talion - ACE Ripper 2000kv, HW Quicrun 150a, Brushless 25kg servo
Sakura D4 AWD - Tacon 3930kv, HW EZRun 60a, Blue Bird Servo