It's a bit late in the game but I will add in my experience anyway. First off, I absolutely love my Dillon digital scale. If you do more than a few rounds per year a reliable digital is almost mandatory because beam scales are slow. However, if you have a decent beam scale that is magnetically balanced - and you know how to zero it correctly - you will always know with certainty what you're loading into your cases. With an electronic scale, especially if it's all you have, you can never be certain! I cross check the Dillon with my RCBS 10-10 scale whenever I'm loading anything critical... precision ammo, max or min loads, anything that needs the extra attention for accuracy or safety. I don't check each load, I just confirm that the digital is reading correctly, then go for it. I have made my own check weights when the beam & digital were agreeing on things and can use those as well. The thing about a beam scale it that they are mechanical and it's usually easy to tell if it's messed up. Not so much with a digital. They can get freaked out over all kinds of things and small errors can creep in slowly as well, as happened with my Dillon (even at several years of age they replaced it free. If anyone has better customer service than Leupold, it's probably Dillon). So get a decent beam scale first, then get a digital and cross check them as often as you think might be necessary. If I had to give up one, it would be the digital. One last bit of advice, learn to calibrate/zero your scale first thing. Any scale that gets moved (even a couple of inches) should be calibrated/zeroed. Even if it gets a good bump! You can't zero a scale too often!
Cheers,
crkckr