I would take a measurement of 2 set points width wise,( not the bolt holes) perhaps the weld points, write it down, so when you remove the bar and fit the new one you can adjust it so the 2 same points you measured previously are now the same.
That way you have not changed the alignment.
Brand wise, anything will be fine as long as it is adjustable.
Just my thoughts, polished aluminium ones do look good !!
Mine is polished alloy as you can see in this pic !
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