It comes down to 6x9 Linhof or 6x9 Horseman or Baby Graphic. If we throw out Baby Graphic and just look at the two 'modern' systems it is probably a 'toss-up' as to which is better for you. Both of them have many little accessories that are useful but hard to locate. Both can be expensive. When new the Linhof was much more expensive and is better built. Now days you can probably get a very old and tired Linhof for the same price or less than a very clean late model Horseman HVR or ER-1.
I went with the Horseman VH-R system.
This site has some good info on the Horseman Technical cameras. http://www.bnphoto.org/bnphoto/LFN/C..._Horseman1.htm