I need a teleconverter

For my G2, I need a good teleconverter. If the quality is good, I don't mind to spend some good bucks. If you have experience and think both expensive and inexpensive ones work the same way, then share those with me.

I am looking for a teleconverter and not a telezoom because I got into the m43 system as I didn't want to carry heavy lens of DSLRs. So, buying a telezoom doesn't make sense to me. Not criticizing those who do, BTW.

Any teleconverter like 1.4x or 2.0x will be fine. Any help will be appreciated.