The Canon T90 has got a spot meter which you can read via a quite large balance type scale.
You can handle that scale like that of the Profisix/Lunasix meters of Gossen. That was reason to me to buy that camera.
However it's questionable whether it's still a `manual´ camera. However, it is manual focus.
Bronica ETRSi; Well it's not 35mm, but if you stick a speedgrip and an AE3 prism on it it will spotmeter (sort of) and it handles like 35mm and the results are really special.
This may seem facile to you, but since you already have a spotmeter why not get whatever SLR you like best and continue with the hand meter? That way you don't need to fine tune things to a new meter.
I've used the same Pentax analog 1 degree spotmeter since 1982 and it is a champ! Zone VI modified the meter in 1992. It has never let me down.
I have a D200 with a built in spotmeter that I rarely use, but it gave exactly the same gray card reading as my Pentax when I compared them. So I imagine a new or recent Nikon 35mm SLR would have a similar spotmeter.
I wouldn't want a spotmeter that was larger than 1 degree though.
No. The Spottie you or I could buy at the time had an averaging meter. It had a spot meter though in prototype versions. I will recommend the T90 as a good spot metering manual focus camera. I use mine with FD, Adaptall II, and M42 lenses.
Well, I use a 30 year old Mamiya DSX1000B, it has spot and average metering and uses M42 lenses (but some models need that you stop down for the meter to work). It works even without batteries (but no meter) and has speeds from 1/1000 to 1 second and a bulb mode. Also, remember that they're FULLY manual, so forget about autofocus or aperture priority.
They're really cheap in eBay, 20 euros the body only. And are solid as a rock.