I have played and loved Cho'gath many times.
Not only can he tank, but he can eat up EVERYTHING at ANYTIME.
This is my second build, and enjoy.

Pros:
- Fast killer
- Good damage
- Can tank like a boss
- Lots of health
- Good disabler
Cons:
- Can't match up to fed tryn's and yi's.
- Something...
- I can't think of anything else...

- Warmogs for health
- Impaler for damage because of your health
- Malady for attack speed and ap
- Boots of speed for chasing
- And the force of nature for not dying in case you go kamikaze.

Early game: You can tank quite a bit, and you are an excellent harasser with your rupture. Use it, but don't spam it. Try to get lots of money, because you'll need it.
Mid game: Cho now can tank decently, and he can start to eat others up. In a team fight, go first, and run the f*ck back when you're low ( which might happen a lot if your reckless like me ;] ).
Late game: You should have finished your build. If the enemy is not especially fed, you are the
- Carry
- Initiator
- Rapist
- DPS guy
You are not fragile, yet you deal an enormous amount of damage.

The same way you farm as master yi or tryn. Except you can hit more than 1 enemy. And except that you should DOMINATE your lane.