Hacker motors are some of the best quality for your buck motors out there IMHO, I've used quite a few brands and although I don't have much or any bad to say about the other brands I've used including Axi, E-flite and a few others the Hackers just have that bit of an edge above the others when it comes to efficiency and quality. Of course this comes at a price. If you're seriously in a jam budget wise I'd always suggest looking at the E-flite motors, they do get the job done most of the time. I'm however in the process of slowly changing all the motors I run in foamies and things over to Hackers if this gives you any idea how much I've fallen in love with the brand, their really worth the extra penny if you take the proper time to pick the right motor/prop combo...which is also pretty easy with the Hackers (They have the right motor for virtually every application). The only other brand I'd class above Hacker at the moment is Steve Neu's motors from my experience, but the Neu motors IMHO is for those with plenty of change or a serious competitive requirement...excellent stuff.

Hacker ESC's also rock! Can't say I have much love for the E-flite speedcontrollers but as long as you use them in safe enviroments they also work. The world models ESC's mentioned above are also great bang for your buck stuff along with some others.