Thanks for the tips. To clarify, I may have phrased things strangely, but I do use my left hand for command+whatever.
Those keyboard layouts look nice but really what's getting me is one specific thing which is that on all keyboards I can find except for Apple's the spacebar is quite wide, spanning on the left to about halfway underneath the the X key. This is point of discomfort because any Command + operations went from comfortable to really awkward and it's unfortunate because I was pumped to make the transition to mechanical keyboards...