Lots of growth stocks have seen some extraordinary growth recently. Netflix, Shopify, and PayPal, for instance, have seen their stocks soar 166%, 97%, and 63%, respectively, over the past 12 months. Growth like this has left many excellent companies trading at questionable valuations. Investors looking to buy fast-growing companies at reasonable prices, therefore, may feel like there aren't any choices left.But two hot growth still look attractive -- even after recent big run-ups.