Biotechnology stocks are crashing, but not all biotech stocks are created equal. In fact, I think these three biotech stocks have something that every investor can get excited about: sales and profit growth.

There's no telling where shares in Celgene Corporation (NASDAQ:CELG), Gilead Sciences (NASDAQ:GILD), or BIogen (NASDAQ:BIIB) are heading in the next days or weeks, but all three are biotechnology powerhouses with the kind of staying power that makes them worthy of considering for long-term portfolios.

Still not convinced? In the following slideshow, I tell you which one of these companies' long-term forecast has me giddy, which one has a dirt cheap valuation that makes me think it's a bargain, and which has the financial chops to weather any storm.