Hi Adrian, I appreciate your reply.
Yes I'm leaning towards a Used 5D Mk2, the price is around 1000 USD. A Used Mk3 is around 2000 USD (which is out of my budget). But my concern is:
1. Is 5D MK2 better than the GH3? (a Used GH3's price is around 1k USD.)
2. Is there will be a time that GH3 will surpassed the GH2? (Hacking)
3. The one holding me back in getting the 5d MK2 is the Aliasing problem in which is why others avoid it.
Yeah, I know those are little things but I'm more comfortable of buying the camera that last for me at least 3years.