Paul, I'd wager 90% or more of the people who do work like you use Capture One, whether with a Phase One back or with a small-format camera. It's the absolute industry standard; don't take my word for it, google "Digital Tech" or "Rental Studio" and pick a few random ones to contact to ask what they use; I'll be surprised if you find any at all that don't prefer C1 to any other option. Yes, it has overlay, including in live view, and yes it can be placed on a second monitor. But I think you'll be very pleasantly surprised by the sheer quantity of workflow tools and options that C1 affords you that Phocus does not. This all sounds very shill, but it's because I'm always very excited when someone who doesn't know about C1 gets a chance to see it for the first time, especially if they are shooting tethered in a studio (it's also really really good for raw editing whether you're tethered or not, but the tethering options are *really* head and shoulders above the rest.
When you consider upgrading your Hasselblad back I'd (selfishly) suggest allowing us to help you test a Phase One back. Phase One has continued to make major investments in their full-frame 645 medium format platform (the XF) and the range of tools, capabilities are very long (I won't bore you hear with that list, but if you're interested I'm glad to discuss further), the stability/robustness/just-works ness of the product is extremely good, and the image quality is second to none. We come through Austin, Dallas, and Houston several times per year, are currently wrapping up the dates/times for our next such trip, and can always arrange a remote demo (e.g. Skype Video/Screen-Sharing) or evaluation unit.
If you need a getting started tutorial on C1 I'd suggest learn.phaseone.com which is free and can be accessed anytime. If you're more of an in-person-learning kind of person I can (again, selfishly) suggest our
Capture One Classes that are taught in LA and NYC and occasionally other cities (on the schedule right now is one for San Fran).
Notably, C1 does not support Hasselblad cameras (they are a direct competitor) so the feature set of C1 is only available to you if you are switching away from the Hassy platform. If you are staying on Hassy then the only two softwares for tethering are LR and Phocus.
