If you are really picky, fit a motorized valve.

Well I was always going to install at least one valve, shared between the
two. However, I'm leaning towards installing two now. The main objection to
having two was aesthetic anyway.

I can;t answer for teh Kickspace, but my 'vectors had no balancing
valves. These are manadatory to stop them hogging CH flow.

Well, I'd prefer a proper balanced system anyway even if fully valved. I was
intending to install balancing valves if none were fitted. The technical
specs don't mention it, but do say what flow rate you need through them to
get full power, with the obvious implication that you should throttle them
down to that if you want anything else on the system to work.

Christian.