Mike, welcome. The M60s don't have any unusual requirements and there's no need to look for a specific receiver that would "pair" or "match" better with them. So, there's no "best solution" for you. If you've already studied the HK 247 closely and you like the features and price, there's no good reason not to go with it. Just to mention another excellent unit that fits your budget, you might also consider the Onkyo 605.

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Enjoy the music, not the equipment.