When it comes to investing you can’t ask for anything more than capital gains with perhaps a little dividend income along the way. Unfortunately, finding the kind of businesses that are likely to deliver both over the long term is no easy task. However, it’s not impossible, with some of the more under-the-radar ASX companies offering the best opportunity to deliver handsome returns to smart investors.

Below I have three growth picks I would buy with $10,000 today.

Mitula Group Ltd (ASX: MUA) is an up-and-coming global website operator that aggregates third-party classifieds adverts on its own websites to help boost their visitor numbers. It’s primarily a global company that is superbly leveraged to the growth of a digital economy that is heavily outpacing wider global economic growth. The business is profitable with a healthy balance sheet and shares are on an attractive valuation at $1.09 for investors after growth at a reasonable price.

ResMed Inc. (CHESS) (ASX: RMD) is the sleep treatment global medical device company that is also increasingly moving into the digital health and health software-as-a-service space. The company’s market-leading products and global horizons have delivered bulletproof like quarter-on-quarter revenue growth. Family run with a long-term focus, I think the ASX-listed scrip at $8.62 looks good value for growth-oriented investors after some overseas exposure.

Sirtex Medical Limited (ASX: SRX) is another global healthcare specialist that is growing sales and profits at consistent double-digit rates thanks to the growing awareness of its SIR-Spheres specialist cancer treatment. The company grew dose sales by 16.7% in financial year 2016 and has forecast another year of double-digit sales growth with several clinical trials in progress that are aimed at promoting further use of its products by oncologists. The shares sells for $30.90, which looks a reasonable price given the potential for the company to keep growing strongly for the next five years and beyond.

If you are interested in quality dividend shares, then I would recommend this top dividend share instead. A strong yield and potential share price gains make this a great investment idea in my opinion.

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Motley Fool contributor Tom Richardson owns shares of ResMed Inc. and Sirtex Medical Limited.

You can find Tom on Twitter @tommyr345

The Motley Fool Australia has no position in any of the stocks mentioned. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.