I chose the SkyRadar DX from Radenna because it's wifi and will talk to Apple, Android, and iFly hardware. Beware Bluetooth-only devices such as the Dual 170 since it won't work with wifi-only iFly's. Also, some won't talk to Androids, such as my old SkyRadar L. I suggest you make a list of ADSB units that is guaranteed to work with your hardware and software, and then narrow it down to your personal requirements such as AHRS, ADSB-out, internal battery/ship powered, dual band/single band, best traffic alerts, budget, etc. I've had good luck with both my SkyRadar's and they seem to be the price/feature leaders. But I think all the bad hardware companies have gone out of business and the market is loaded with quality products. iFly has a few ADSB options for sale on their store page; I'm sure you can't go wrong with those. Good luck! Once you have weather in the cockpit you'll marvel at how brave you were to ever leave the pattern without it.