You'll never make a ROI on the most expensive ASIC at the current exchange, if you want to make money off of BTC, buy it when its low, sell when it's high. You said you used to trade stocks, so you should be experienced.
![Tongue](https://bitcointalk.org/Smileys/default/tongue.gif)
I agree. There's not much to be made mininig at the current difficulty. Personally, I've given up mining for myself.
I sell short term mining contracts on eBay and make four times what I would if I kept the BTC for myself.
Sorry to be a bummer, it just doesn't seem like a good time to get into mining.
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