OT-wet basement (lengthy)

Before you back fill, cover the exterior walls with driveway sealant, and run plastic sheet up the walls- DO NOT COVER YOUR GRAVEL. Leave about 4 feet at the top loose and then start backfilling. About 8" below ground level, fold your plastic back out into the yard and continue filling. Make sure that you mound dirt higher along the wall so everything flows away from the house instead of pooling around it.

Connect unperforated black pipe to all downspouts and get it well away from the house to.

Good external french drains will solve your problem without the need for a sump pump. I had a terrible mess for 10 years before a broke down and started digging- this fixed it once and for all

Always devert water rather than trying to deal with it against the basment wall.

After deverting 99% A lower yet somewhat expensive way to back it up is to take a tiling machine and dig a tile around the house three foot deeper than the basment. Get as close as reasonably possible and fill the trench with washed rock or creek rock. Third insurance is then sealing the basment wall is good, ON THE OUTSIDE and you might as well get it over with. We usualy power wash the wall and plaster it up with masonary sand and mason cement. A good idea is to paint the wall with pure mason cement and water mixed (no sand). Thin to paint like latex paint. We use a drywall texture gun so it goes real fast. This gives you a real rich mix at the contact point. Then plaster it up with mason cement and sand--This is how they used to make cysterns. After it cures for a week or so you can paint it with tar. You must have a drain tile ----- BELOW the footing, not on or level with it. And again backfill with a clean rock. You will not need a sump pump if you let mother nature do it. Make sure you use a rodent guard at the end of your tile so no cats go up and plug it. Wet basments do not go away on their own, and sump pumps are a pain unless you don't own one.

This last Friday I replaced four that were less than two months old and two were purchased Friday morning. The floats were falling off one, and most folks do not realize the fact that water cools the pumps. Therefore you can not expect them to work sitting on a basment floor.

Of course it cost you some money, but take into consideration the deductable when the water does come in, plus the mess to boot. Insurance companies are not going to take a second hit if you are lucky enough to get covered the first time. Get your name on the uninsureable list. It is a new ball game with insurance companies.
We have had a contractor in our area that passed away a while back. Any call from his jobs are easy to discover the problem... FHA said you had to bury a drain tile completly around the house. They made no mention to have a tile leading the water away. He just made a complete circle and tied the ends together. He was the cheapest bid however.

Ya kinda hate tearing up the yard, but today is better than a couple years from now.

About that proprietary system...it will work if your basement walls are solid. You are going to be dealing with trickles, not sheets of water here. If you have any movement of the wall where that "Beaver board" is installed, the system will come apart and leak.