I will speak positively about the Shen Hao. I think it will fit your bill exactly, with two exceptions. One, you CAN use the standard bellows with a 75 or a 90, but movements will be highly constrained. However, there is an accessory bag bellows you can get for very little money, and you can use the 75, 90, and even a 150 with the bag bellows, to focus closer than infinity (You can even use a 210 at infinity, and a little closer, but not much, with the bag bellows installed). Two, it does not have front shift. However, it has HUGE amounts of rear shift, enough to outrun the image circle of most wide-angle lenses. It has front rise, fall, swing, and tilt. Rear rise, swing, shift, tilt. All at the same time, if you like. It is quite rigid, quite compact, and very durable.