Speed sensitivity is usually an indication of worn suspension components or improper Caster, not balance. It's called "Death Wobble". Check the entire front suspension especially the ball joints and tie-rod ends. Improper Caster can also cause this. Very common in Jeeps with larger wheels and tires. Installing larger wheels and tires on a suspension that was not designed for them usually causes problems. Some instantly, like your problem. Others over time like early failure of wheel bearings or ball joints etc.
If you believe its balance, take it to an old school place that can balance on the vehicle. This is the absolute best, and only way to properly balance a tire. It balances your entire rotating assembly, brake discs and bearings with your wheel and tire. Everything that rotates as you roll down the road is in true balance.
Static balance? Total waste of money. Spin balance off the car? Slightly better than static.
All you're really doing is balancing your wheel/tire assembly to that machine, not your car.
My two cents worth.
Hope ya get it fixed. Vibaration sucks!