You didn't mention power cords. What do you have? I would address this first.
And how much are you prepared to pay for how much improvement? Generally speaking, to get some control over the incoming current is quite expensive. But still you could improve the situation for a few hundred dollars if you wait and buy used.
And how much are you prepared to pay for how much improvement? Generally speaking, to get some control over the incoming current is quite expensive. But still you could improve the situation for a few hundred dollars if you wait and buy used.