Can somebody recommend a suitable audio cabinet/wall unit?

Please also see the Salamander design your own tab for custom cabinets.  They have many cabinet options for you to choose from. 

And, see the Salamander web site for retailers in your area.  For example, please see:

https://www.maximumav.com

hgeifman,
Thank you very much for all the information. Maximum A/V just happens to be close by. I have only been in FL for two days and it would be great if this A/V dealer could become my 'go to' store. Again, many thanks for your assistance and your lightning fast response. John

You are welcome.  Please measure your space and audio equipment 3 times to ensure you get the right sized cabinet.  

Check all clearances in the back, front, sides and top.  Verify your 70” TV fits in the allocated space.   If needed, I suggest your retailer visit your home to confirm your space and all measurements.   Please also confirm your electrical power plugs and your Internet cabling matches your needs.  Review how the wiring will fit behind the cabinet. If needed, make a drawing to verify the spacing.  Enjoy.    

Hello hgeifman,
I see that you have done almost 1300 posts so, if you do not mind, I have a couple more questions. Having been in FL only four days, I have lost power on several occasions for just a second or two. Just long enough for me to have to reset all the clocks. I am sure that when the power goes off and then on, it must go beyond the normal 120V. Is there anything you could recommend to save my equipment before I plug everything in? Secondly, one of the Salamander cabinets had enclosures at each end for a subwoofer. Does putting subwoofers in cabinets affect the bass? I do have the four powered sub's but only the two GoldenEar subs would fit. I'm open to any suggestions before I proceed. Carpeting and flooring being done over the next four days.....then my home theater. Thank you very much for any help regarding these items.  

John