We bought a
Weber Q100 last summer, and it's been perfect for the two of us - as well as serving quite nicely when we cooked out for around 15 people last August (we just did the food in shifts!) - I'd definitely recommend this model!
We bought ours from online because it was £25 cheaper than the one at Homebase and the store didn't have any of the canisters anyway. The canisters are a bit of a pain to locate but once we did find them (in a garden shop the next town over) we just stocked up with half a dozen at once.

Now that we know what works, we'll just order them when we need them next. When we're not using it, we just chuck it in the garage so no-one nicks it.

Here's a photo of ours, for reference (plz to be ignoring our overgrown back garden!):