I know where you're coming from. It's the standard bar's sweep that is the problem - it's over generous and causes the pressure you describe, and turned out wrists to compensate. The angle gets worse the broader your shoulders are.

I'd take a look at some Renthal 722-01 Dakar "medium" bars, the sweep is about half of that on the stock bars. They're about 25-30mm higher than stock, so not too much, and are exactly the same width. You should be able to get away with the standard cables.

Renthal do a 613 Daker "high", which is popular, but they are 35mm wider, much higher and would require some "cable-fiddling".

http://www.intobikes.co.uk/products/000067/Renthal-Dakar-High-Handlebar

If you want bars with hardly any sweep at all, then take a look at some 7/8" trials bars.

See if you can find an MX shop locally that carries Renthal bars in stock, get some in your hands and see how the different sweep dimensions feel.

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