Instead of the US or British Imperials, or the metric using standard base, we should switch to dozenal metric. Why? The imperial system has the advantage of using certain logic of dozenal system, and the metric unit is inheritably superior for conversions. Imperial Units downfall is their needless complication of converting between units, and there is no universal expression for imperial measurements. Metric units using standard base downfall is their reduced divisibility in comparison with metric units using dozenal base. This makes dozenal metric ideals as it has all the advantages of both systems, and it eliminates downfalls of both.
To expand on the downfall of both system, let's start with the issue of imperial units. Suppose someone tells you to convert 200.375" to imperial decitectural form where feets are annotated, you'd have to start with feet annotation. You divide 200 by 12, and you get 16'. Then, you have to subtract 200 by 16*12 to get the inch integer which would be 4 and finally you have to create a fraction representing the remaining decimal and you get 3/8. Therefore, 200.375 inches = 16' - 4 3/8". It can also be expressed as 200 3/8".
The problem doesn't even end there. If someone asks you to express 7 yds, 4 feet, and 5. 6459 inches into decitectural form, well, good luck with that. 3.5 Mi to In requires you to do mental gymnastics, pen and pencil or calculator. In the metric system, 3.5 KM = 3,500 M, and that's very easy on the brain as it all involves just moving decimal points (More on that later). And let's not get into dead units like chains or ramsen's chain or poppy seeds in the imperial units. At this point, the issue with imperial system has been covered.
As for the issue with standard base, it has less divisibility than dozenal base. 10 in the standard base can only be divided into integers with 2,5 whereas in the dozenal system, 10 can be divided evenly in integer by 2,3, 4, and 6. Furthermore, 1 kilometer is 1000 meters is true in the dozenal metric system. As you can see, the usage of 10^x doesn't change by bases.
In scientific application, meter is defined as the length light travels at 1/8770X seconds according to the dozenal metric system, and that is far more cleaner than the base-10 version of metric. The issue here is that a lot of things would have to be redefined so that units and their relationship between variables would be consistent because base changes the very definition of some units that has been well-established by altering what defines 1 unit of something within that base.
And yes, I know this isn't feasible, but it's the best system there is.