Hi rglinvest,

Just buy the BTC, maybe even better: split the 2000$ and buy BTC / LTC (70% / 30%). Because LTC might be coming to MtGox and other exchanges soon (or someday), which will boost its value.

The ROI for your 2000$ Buttefly Labs SC 60GH is 13.17 weeks at the current difficulty and exchange rate (637.38$/BTC).
This is without any power cost, so just the miner. Besides that, butterfly labs doesn't seem to deliver fast... prepare to wait a month for your order to arive.

So my advice: invest wisely and split between BTC and LTC.

Kind regards,
Verduveltje