Five ETF ideas to consider after the market selloff

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The exchange-traded fund market is exploding. Two hundred and fifty eight new ETFs launched over the past 12 months. Big new firms like The Preferred Financial, U.S. Global Investors—even CNBC's own Kevin "The Shark" O'Leary—have entered the market.

But are these funds any good? So far, investors have put $10.9 billion in net new money into these new products. Here are five of my favorites, ranked in no particular order. With the market down 10 percent in the past month, now could be a good entry point.