Without more info, I don't really know what you are having problems with but it sounds like this http://powergy.com/products.aspx would help you. I use one and it seems to be great.
Potentials is in the business of industrial and residential power
correction and filtration.
I use an EP-2050 whole house filter. $650, plus installation.
BTW, mentioning Environmental Potentials has proven to be a guaranteed
thread killer... no idea why :)
I got it direct. Price is a bit higher then most of the competitors..It's about $900 but look at the specs. For the money you can't beat it IMO. It also has power factor correction. You must really look into the specs on these as they all do the same thing but it's a matter of how much they do.