The digital furnaces are great, I’ve used several makes and
different sizes over the years, make sure you get one with automatic
temp controls. The manual ones are pretty useless, they require baby
Keep in mind that with brass and bronze, you’ll be at the upper end
of their working range which tends to cook crucibles and elements a
bit faster than the usual Sterling and gold.
You’re not going to melt 5 lbs of anything except gold at one time
in them either, they’re not quite big enough for that.