I use the gem pro that jackin sent you a link to, its super accurate but a bit finicky until warmed up. Also heard alot of good things about pact.
I bought the GemPro to use as a "double check" with my RCBS Chargemaster 1500. The beauty is that they agree.
In addition, it's generally easier to use to weigh bullets, cases, etc on the GemPro. I tend to turn it on 24 hours before I need it, or sometimes leave it on if I'll be coming back to it in a day or so. It definitely takes time to warm up even with filters on the electrical line to eliminate spikes. The Chargemaster seems ready immediately.