2/4 or 3/6 6max?

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hey all you guys,

About a month ago I posted a thread where I asked for advice on what to do after crushing 1/2. I followed the advice of some of the posters and went and played 1/2 6max. I've played 4000 hands in the past month, (I don't multi-table), and I'm hitting it for 7.8BB/100 hands. My bankroll is a big fat cow. But I have a dilemma...

On my other thread someone said that once you move to 6max you will want to stay forever. I found that difficult to believe. Now I am a believer. So what do I do? Do I go back to full ring at 2/4 or take a hit at the 3/6 6max. The reason why I'm not sure about the 3/6 is that I'm worried that the much larger dollar amounts will cower me somewhat without the buffer of 2/4 first.
Any ideas?