Dilemma - bar ends or ergon grips ?

I've been getting some pins and needles after riding distances in excess of 20 miles so decided I need to change my bars - question is do I get bar ends to allow me to change position or do I get the ergon type grips which suppirt my wrists at a better angle ?
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I did that and found them an improvement but I've now gone a step further and fitted butterfly bars since my commute has increased to 19.7 miles...
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P.S. Note that the link is not a recommendation - I've never used that supplier - but it seems a good price...
Mountain bikers mainly use bar ends when climbing steep hills, where being leant further forward helps avoid wheelying backwards over uneven surfaces - not relevent to my riding.
A swept-back bar was even more comfy. They also worked with the ergo grips, with the side effect of a more upright position as my grip was moved a couple of inches backwards.
Thumb pain may be because your hand wants to rotate out naturally and the thumb is preventing it. That is one reason I went with swoopy bars.
It may be pressure on the nerves but that is usually the cause of numbness of the smaller fingers.
Everyday Commuter