For my buck, the ERTS series is a go to. It's a decent format to print 8x10, without losing a lot of area as you would with 6x6. Plus, almost any lens can be had for under $200 in good shape. Backs, I've never paid over $15 for.
Compared to my Hasselblad, I shoot the ERTS more simply because I've been able to afford more options for it, it's lighter, and faster to shoot with the AE-III prism and Speed grip. I'd have to re-mortgage my house to buy half of the Bronica stuff I own to fit my Hassy. Sure, the Hassy's quality is far and above the Bronica's, but in almost anything but studio settings I'll back the ETRS.