I'm a bitcoin newbie, and there is something I have been wondering, which I haven't seen discussed here...

Most miners keeping a lot of their mined coins leads to a smaller supply, and subsequently to a more rapidly increasing price.
Increased price leads to greater incentive to mine, and subsequently to increased network hashing power and difficulty.
Increased difficulty leads to less generated coins per hash.

To put it simply, keep mined coins => get less coins in the future. Which might mean that in the long term, there may not be such a big difference between hoarding and selling (or spending) coins almost immediately, at least if you look at the bitcoin economy as a whole.

Most people who hoard coins are probably entertaining the idea of spending or selling them at some point. So, eventually, they'll be adding to the supply anyway. Of course, timing will make a difference and some people will have more luck than others.

Taking the thought further, I think it might actually make sense to save some mined coins and spend or sell some, to even out some of the luck.
What would be a good ratio and what would go into determining it?
How much of a gamble is saving?
How much of a gamble is spending?
Should you factor in the hashing power of your mining rig?
Or am I overlooking something obvious?

Any thoughts?

Does anyone know how the Vapor-X differs from the regular 5850 ?

I was offered a good deal on a bunch of Vapor-X cards, but am a bit hesitant because the shop seems to have sold everything else except these...