I think one of the things you need to look at when buying from the 'clone' companies is their policy on returns - especially in cases where you aren't quite sure whether you're making the right decision
Pinemeadow & Gigagolf have a 30 day guarantee where you can use the equipment and if you're not happy you get a full refund, and no restocking fee is charged.
Not all vendors will make this offer, so there must be some level of confidence in their product.
They know they have to go that extra step to convince you they are good quality, so you may as well take advantage of their offer - think pinemeadow has free shipping on orders over 72 bucks as well.
If they don't work out, no loss, just send 'em back and go and get that second hand set from an OEM.