Any recommendations for either?

I am a REALTOR in Arlington, and I have used Property Doctors for inspections for several clients, and I highly recommend them!
http://www.propertydoctorsdfw.com
817-401-4002
greg@propertydoctorsdfw.com
They also have an app for phones that you can download to check their prices and book appointments. I know the owner well, and they will treat you right and do a thorough inspection with detailed report.

For HVAC, I have personally used Calverley Heat and Air for my home a few times, and I have been very satisfied with their service. They fixed a problem with my unit that another company told me would be over $900 to repair, and it ended up just being the cost of the service call, because the other company had installed something incorrectly.
http://www.calverleyair.com
817-572-7100
They are very prompt, professional, and reasonably priced.

If you have questions or need other referrals in Arlington, feel free to call or text me at 817-307-0987. My name is Doug.

Frymire did my last AC replacement. About $1500 less than the other 2 people I had checked and is Aggie owned