When I was hunting, I struggled to find a Sport, tried John Lewis and Mothercare etc. You might have more luck with a small, independent shop than a chain.
Obviously as a City Select owner, I do quite like it!! My husband was convinced we'd be better off with a P&T because of their 'compactness' but there are a few things about them I didn't like.
There were a few things which sold the CS to me; It's very versatile in terms of the seat configuration. When I bought our single pushchair for our first child, it was important to us that it could be parent-facing so we could interact. Same applies with second child. I can use a carrycot or carseat (it's compatible with the Maxi-Cosi Cabriofix, which we already have). I didn't like the 'slung underneath' factor with the P&T. When using two pushchair seats, they are tiered with the rear child higher up, so I think they'll both be able to see out properly. With the P&T, I imagine the rear child has to peer around the side.
My husband thought the CS would be huge, but when we compared it side by side with a P&T, the CS was only a few inches longer and about the same width. The CS is narrower than my Quinny Buzz.
As for it being heavy, I can't say I've noticed it being a problem. I don't pick it up and carry it, and when pushing my two children in it, the weight doesn't seem to be an issue. One thing I will say, is that going up and down raised kerbs, or the step into my house, I have to use the bar at the bottom for leverage, but that's what it's there for!
I've only had our CS for a few weeks, but I've had several people approach me, admiring it