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I don't know electric ones but what about something like
It should be a lot more ergonomic. I see Alton Brown use that style and it looks a lot easier. As for salt, do you need a grinder? Pepper is one story because it goes stale but salt is salt, there is no fresh to grinding it when a shaker does fine. For cooking look into a salt cellar, it stays covered but lets you grab the amount of salt you need, usually people use kosher salt because it is easier to handle but any will work.
There's nice looking pepper grinders and there are high functioning pepper grinders. One or the other is pretty cheap, but to get both features in one grinder is expensive. I have this one and will buy another one when it breaks:
I have the OXO Good Grips pepper mill with a proper crank and I'll never go back to a "fancy" pepper mill. [link]
Since you already have a couple nice ones, I would suggest cracking the Tellicherries manually with a mallet or rolling pin before adding them to the mill. However, the OXO one can't be beat for the price and ease of use, IMO.
I have one of these OXO grinders. It's a stand alone grinder, not something that screws onto jars, but it's very easy to fill and empty. You could store your spices in jars with a shape and size that you like and then just use this to grind the amount of each that you need.
Step up your flavor game and get some legit spices from Penzey's or Myspicesage.com, it is really amazing how much of a difference it makes when you're cooking. If you're still using pre-ground black pepper, get some of those tellicherry black peppercorns and a pepper grinder, I'm partial to this one because it is cheap, the output is high, and the grind adjustment works pretty well. I've had mine for about 2 years now without issue.
I think I might try
If you want something a bit cheaper I've had This guy from OXO for two years and it's still working very well.
I have this OXO one and it produces a lot of pepper fairly fast.