Your opininon Steve would be interesting, since you can compare the RB and ETRS (as I understand from you website)..
I have stated this before in another thread:
I bought the ETRS because it was the only medium format SLR I could afford at the time. A couple of years later I bought the RB67 - mainly because I had a 6x7 enlarger and wanted to use it to its full extent.
If at the time of buying the ETRS, I had a bit more money, I would have bought an SQ instead and would probably not have bothered with the RB67.
I like the ETRS but I think I would like the SQ more - mainly because I like hand holding with a grip and using a waist level finder. This limits the ETRS to horizontal format shots but is irrelevant for the SQ's square format and isn't an issue with the RB67 and its rotating back.
Whilst I like the RB67 and happily hand hold it and carry it for quite a few miles, it would not suit everyone and it's definitely a good idea to try one out first if possible.
If I understand correctly, you have tried one and didn't like it. See if you can find someone near to you with an ETRS and/or an SQ to look at.
Steve.