Keep an eye open for a used one. I bought mine for about the same price as a used HX35, including the downpipe!
Stay away from the chinese crap! All of the ones i have seen have 18cm+ exhaust housings which are too big for our trucks to spool good, and they usually only have a 56mm compressor which is the same size as most HX35's. The exhaust housings are T-4 a lot of the time too, which requires a $75 adapter since our manifolds are T-3
Just keep an eye out for a used one, and make sure it has a 16cm wastegated exhaust housing(keep the boost at or under 40psi), and at least a 58mm compressor wheel. 60mm compressor wheel is ideal, but mine is a 58mm and does pretty decent. I think it probably lowered drive pressure a decent bit and lets the motor breathe better on the exhaust since it is a 4 inch outlet instead of a 3" outlet. You can usually buy a nice used one for $300-500 and they should last you a long time if you keep the boost down, and dont bark it.
Eric