art wrote:

...
If you only have three months to cash your coupon it is better
to wai until you are closer to the official change over time
to obtain the latest developments in manufacture.
Art

I would make sure I purchased one which allowed upgrades to its'
firmware, indeed, I would do this with any "smart" electronic device,
even my digital camera(s).

Cheap chinese junk is better left alone, however, it is more and more
difficult to find anything else!

Regards,
JS