I installed some from eBay and have no issues with LED power supply produced noise and they cost me about $10. I did have to go through a few models to find a set that didn't make any noise but I still didn't spend more than $40 until I found the right ones. It's the same models I used with my Cessna and they lasted about 2 years until I sold it and they're still working for the new owner.
You can buy what everyone buys or you can EXPERIMENT like your certificate says and test a few until you find something that works. It's not I'm going to fall out of the sky due to an LED any time soon.
Extremely happy with my AeroLeds Nav/ Strobs. Super bright and if you wire them as directed from AeroLed there is no problems with electrical noise in your audio system.
I've installed AeroLEDs for NAV/Strobe and Landing/Taxi on my RV-10. Very happy with them, although it was a pain to have to cut the front of the wing tips and glass in a modified tip to fit the Landing/Taxi lights. But the end result is great.