Any thoughts on the power rack with the pump bypassed? Ie run as a non power set up?

I have power steering, much prefer it over the manual rack. The P/S turns off after 10-20kmh anyway and then becomes very similar to a manual rack.

My car runs 17's and a big brake kit. If i had manual steering it would be a pain in car parks due to the extra unsprung weight

You can turn off the power steering motor easy enough. Just unpin the PS pin (I think) on the cars ECU.
I did run the car for months like this. It was a pain in car parks & fine for normal driving - but it isn't the same as a non power steering setup as it'll be heavier. Your having to fight the electric motor. I have wondered if you could drain the power steering fluid and some other components to get it working non-assisted better. That way you don't lose the rack steering ratio.

can people please be aware that turning off your power steering is nothing like a non powersteering MR2 the non powersteering rack is a lot thicker and the turning radius is different...  

I had my power steering relay go in my car and it drove like a tank compared to my non powersteering mr2 

I was referring to bypassing the pump altogether therefore removing the resistance it gives. I have heard you can loop the hydraulic lines at the rack to 'manualise' it.

Xez,
I believe the new Alfa Romeo 4C (mid engined, rear wheel drive) has manual rather than power assisted steering.
cheers
Steve