Which mini pump with co2?

[Ben M]

So, I was impressed with how quickly someone refilled a tube using co2 whilst on a club ride today. I (and everyone else) was less impressed by how long it took me to inflate using my mini morph. So much so that I borrowed a co2 from someone else in the end.

I'd like a pump/ co2 inflator combo. One guy on my ride had one of these:
http://www.evanscycles.com/products/bontrager/air-rush-road-mini-pump-co2-inflator-ec017728

Which looked good. Is there anything else to consider?