5 wins is great. My best is 4 so far.
Your reward was 50 gold and a pack? Am I close?
Had two arena runs with 5 wins yesterday, one with the mage and one with a priest. Outside of the packs, I think one was like 35 gold and 25 dust, while the other was something like 30 gold and a useless Shaman golden card. I think most people turn their golden cards into dust. I keep them for some reason, I guess because they look cool and I am a sucker for collecting.
I find I play a lot better when I am able to slow my play down. I tend to play what I think is the best card without playing out what will happen so it means I lose a card that I would have been better off saving. I have been trying to force myself to sit back and play out the turn in my head before I put any cards down. I am a very inpatient person though, so I really have to work to slow myself down.