Thanks so much for the detailed reply! I will definitely read up on the 35XL and 32HR. In the mean time I will put the Pentax A 645 35mm to use. I do have a lensplate for that mount so best to see if that focal length is what I am after.Congratulations on the purchase! It is a fine back and a lot of fun to use. You're off to a great start with a very nice image!
I've used a number of different wide lenses with the Cambo Actus / CFVii 50c combo. Pentax, Rodenstock, and Canon.
My favorite in terms of quality and usable image circle is the 32HR, but like @Greg Haag said it is a big/heavy lens. Currently, I'm not using the Actus, but I am using the WRS1600 with the Hasselblad. I've also sold my copy of the 32HR and picked up a Schneider 35XL to replace it. The 35XL comes up on the used market fairly frequently and you can find it for about 1/2 to 1/3 the price of the 32HR.
Here is my experience comparing the 35XL to the 32HR. With the 35XL a Center Filter is very important, especially with the CFVii 50c because of the sensor it uses. The 32HR doesn't require one, but the files are noticeable cleaner if you use one. At f/11 without any movements, the 35XL will give you very similar results on the Hasselblad back compared to the 32HR. If you go past 10mm of movement with the Hasselblad 44x33mm sensor then the 32HR starts to leave the 35XL behind in terms of sharpness in the corners. On a Phase One 53.4x40mm sensor then you'll see noticeable difference in the corners with anything greater than 5mm of shift.
I've also used the Pentax A and the HD 645 35mm. Nice lenses that offer a good amount of movement, probably more than the Schneider 35XL, but not as good as the 32HR or the Schneider 35XL in terms of sharpness and clarity.
Edit: Checks price of 32HR... Yep that Pentax A 35mm 645 is going to work out just fine

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