At highway speeds the car "floats" and the ride is is too soft. Had new shocks put in, better but still want to firm up ride

Hello, pretty certain here that the ride you have is the ride you'll get. You can look at suspension components and shock absorbers - as you have, perhaps, and you can look at tires to ensure the proper rated tires are installed on the vehicle and inflation is at the proper pressure level. Beyond that - the vehicle may just not be suitable to your desired feel. In which case, all you can do is - get something you like instead! Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops