I had a similar issue lookng for a dedicate tool for my jeep. I didn't really like the idea of 1/2 and to use and adapter with 3/4 defeats the purpose so I bought a 3/4 Harbor freight breaker and bought an S&K 3/4dr thin wall 19 mm impact socket it's the perfect combination it fits and work. I have a big craftsman set of 3/4 drive std/met at the shop. There's nothing like having the right tool for the time rather then breaking an adapter and be stuck half way through job.
I'd agree with above sliding t- handles in 3/4" drive, I find they are a very underutilized tool and pretty reasonable.
1/2 bars like this snappy, Proto, SK, matco are nice and do hold up especially without abuse. The long ones are awesome there's nothing like a 36" snappy but they have their place and their limitations