I like using a three way head like the Bogen/Manfretto 3047. What I'd really like is the one sold by Gitzo that has a larger plate. I've also used a Majestic but it's a bit heavy to put over your shoulder for more than a few minutes.
The wista 4x5 is really light weight you dont need a whole lot to support it. I use an older bogen 3030 pan tilt head for mine anything bigger is not required for what I do, hiking and some architectural work. A 3047 is nice but adds significant weight.
I dare say your Linhof ball head would be perfectly adequate. You don't say what tripod you are using it might have some bearing on what is a suitable alternative...