GB, I have shot with an SQA for over four years and love it. It is my only SLR. It's condition looked like a five year old taxicab when I got it and it still does. But it has worked flawlessly. My friendly local camera repair guy, a Hassleblad specialist, says the Bronica is actually more reliable and requires less maintenance than the Hassy.
I carry mine in my hand, no strap. It is bulky but comfortable. I almost never shoot it on a tripod and find no problems with mirror slap or unsharp photos at 1//125th.
You just can not buy more camera for the money as you are finding out.
I have the 50mm PS, 65mm PS, 80mm PS, 110mm macro and the 150mm S lenses. They are all very good. But the 110mm macro stands out as one of the sharpest lenses I ever use.
You need an SLR as there are times when they work best. But you only need one. And the Bronica is the one I decided to keep for mine.