Who is your target audience for any of them? Property republic would need to be te company name ...
Supercity - think Manchester are looking to do a bit of rebranding and need a name for it?
York Rentals - needs a company called York to be renting something.
propertyrepublic.co.uk has made me more than my reg fee for the short time she's been in my ownership. I kind of like that one. The www.supercity.co.uk name I love and will only increase in value with time.
yorkrentals.co.uk: rental homes in york...bought for a friend who no longer has use for it...