I remember Neillsville from "The Rock" radio station. ;)
So, to answer the question, we need to know where the water is coming from. You mention that it's due to a high water table.
As such, I'd not ever finish the basement. It will always be one power outage or one clogged drain away from being ruined again.
It also means that your dehumidifier will never 'win'. Basements are moist by default simply due to cooler temps, but if you have constant hydrostatic pressure, it will always be an uphill battle.
Your (what I call) interior footer drain will certainly help, but you're at the mercy of the drains always remaining unclogged and the sump pump always having power. You'll also have to make sure it can handle excessive rain during those big midwestern downpours.
If it was merely an occasional rain/snow melt issue, I'd feel OK finishing the basement, but given the high water table, I'd consider rethinking doing a full finish project down there.
If your water problems are primarily at the footer, It may be OK. As that is exactly what the drain system is designed to handle. But if you have actual cracks in the walls and water is coming in there, I'd be definitely be hesitant.
One other note...a bit further west into MN, the clay soil we were on had a lot of radon. So you may want to get a radon test before thinking of finishing the space as well.
Oh, one last comment: note that the systems being proposed are in no way 'waterproofing' systems. They are water abatement systems--in that they are designed specifically to not be waterproof and actually allow the water to come in so it can be moved out. It's a nit-pick, for sure, but actual waterproofing is an entirely different discussion.
Moisture is coming up through the concrete from below. This is normal in the wet season depending on your area.
NEVER put carpet on a basement floor. It is just a really bad idea. It is a sponge for everything from a leaking water heater, to moisture from humidity in the summer to pet urine, etc. It also hides problems like this until they become moldy and unhealthy.
Clean and patch the floor as best you can and stain it (best) or paint it with epoxy basement paint (better than carpet). If you get moisture in the future it will not damage stain but it may make a small area of paint peel.
Any way you go the moisture is going to continue coming up through the floor unless you hammer up all the concrete and re-pour it with a plastic vapor barrier under it. Modern building codes require a vapor barrier under basement floors to prevent these problems.
Good luck with your project!
Best Answer
Ideally, the builder installed a vapor barrier under the whole slab including the drain but it sounds like they cut a hole in the barrier to dig the pit for the sump. Since concrete is fairly porous, it's probably wicking water from the ground. If it bothers you, try a sealer intended for concrete with your problem. Unfortunately, you can't tell how much pressure the water is under because it evaporates or runs into the sump. Although it shouldn't be much, it will still wreak havoc with surface coatings.