Salvation data is cheaper (about 500$) but will only support one the vendor that you chose. If you intend to repair only your drive the best price you will be able to get in tools is the Salvation Data for Maxtor. But if you want a powerfull tool that will handle most of the drives that you can come across, then you should consider PC-3000 or HRT.
I would buy HRT because it's a lot cheaper then PC-3000. My best advice is for you to wait a little longer for the realease of Atola Insight next year.
At any rate you must pay attention to the list of drives supported by the tool that you are going to buy and check if you drive is listed there.
Also PC-3000 is known to be the best tool until now, the problem is that it's the most expensive also. You can do fancy things with PC-3000 that you will not be able to do with any other tool. So if you are real in the data recovery market you should consider PC-3000.