Loving my 5dM2 but would like good quality slow mo. Buy a 7d or use Twixtor? Any thoughts on best quality slow mo option?

So far I've been underwhelmed by the 7d's 720/60p implementation.

If you need another camera anyway then why not a 7D, otherwise it seems a lot to pay for half speed slow motion. Twixtor will do more for you in slow mo options. There is another point that the 7D does slow mo at 720p and unfortunately the 7D footage at 720p does not look the best.

A friend of mine who shoots on both commercial and feature productions has a 7D but he uses Twixtor for slomo because he wants to keep the higher resolution. The stuff looks great.

right on guys. Don't really need another camera, just great slow mo so maybe twixter is the way forward. does it help at all with the effects of camera motion / rolling shutter?