Money is tight right now and I have a job for two 6" double vises next to each other with parts located in soft jaws. I already own an orange vise and really like it but two of their doubles just aren't in my budget, esp with an uncertain economic future. For those that own one of the cheap $300 double vises on Ebay/Amazon/etc am I going to hate myself in the morning for getting one or for small aluminum parts in soft jaws are they OK?

My thinking is that since the center is fixed the soft jaws should take care of the location accuracy and then it's a matter of the jaw tightening properly. Are they so bad that the top of the jaws will spring and widen up and the parts won't be tight? Or are they good enough to hold small aluminum parts with pretty light cuts (1hp max even though my machine is 10hp).