I had a 670. It was a very nice camera, very sharp lens with lots of contrast. I sold it years ago to help fund a Plaubel Makita 67. The Makita is a folder so it's smaller to carry, but...I think, no, I know, that the Fuji is a more robust camera. I also shoot a 4x5 Crown and other bigger L/F's. I always have a 6x7 rangefinder with me just because they are so damn fast to shoot. It's the perfect camera for airline travel trips that has near 4x5 quality, without the worry of TSA ripping open film holders and boxes.
BTW the 680 might be the best size if you like printing 11x14. The nine negatives fit the file holders. The 10 negs from a 6x7 are a pain. I really wish the the new Fuji folder was a 6x8. I also wish it was around $1200. In any case, the Texas Leica will take a beating that the folders will not. Buy one, be happy.