Have a look in a catalogue for dimensions when folded and weight. We have a Maclaren Techno and it's a bit heavier than others, I think (about 8 kg) but feels light enough and is easy to handle. I think the Sport is lighter.
I have a Maclaren and I absolutely love it. I bought a cheaper one (red and £60 ish from boots, I think it might be a triumph?) that could be partially reclined and will fit into the back but not the boot of my mini. It is so light and easy to handle it has been a fantastic buy and a great alternative to my pram/buggy combo.