Sartorious PMA 7500 here. It only goes to 0.1 g put it's been no problem so far.
If you are mixing pints and half quarts a lot with a PC system get a smaller scale that goes to 0.01. The large, gallon size, scales that go to hundreths are freaking expensive and not really necessary.
I used a small scale called the X-Res for years that doesn't go to 0.01 but reads 0.10 - 0.15 - 0.20, showing you where the scale is hitting the rounding point on the hundredths, worked well for small mixes.
Then again, like binkspot I've used an office store postal scale in a pinch that reads in full grams and mixes came out spot on, but that was with an RFU system, not PC.
I have the RJ-whateverthehell to usb cable for our 7500 scale but haven't hooked up the IMS yet as we don't have an "inkroom computer" at the moment. My hope was to get it going with the scale and print out to thermal labels too.