i currently have a two player, 6 button setup that is working pretty well, however it could be better. i have been tossing around the idea of adding a 7th button for the neogeo games, and also considering a curved layout, which i think may be more comfortable. A while back i removed my trackball and spinner to get rid of some clutter on my panel, but I am thinking of making a new panel and installing them again. so while working out a new layout, i am trying to figure out the best way to accomplish this.
so, from what i can tell..most people who have 6 buttons layouts have them set up like this, correct?

this is how i have mine set up. i thought about making the bottom row buttons 1-3, but it just seemed awkward.
i have also seen alot of 7 button layouts, which I am assuming are set up like this:

in which case you would use butons 1-6 for most games, and use 7456 for neogeo games. this seems to be pretty popular, but I don't like the idea of using one row of buttons for most games, and the other row for other games...it is too confusing for visitors...so I have come up with this.

i would still use 1-6 for street fighter and most games, and for neogeo (and other 4 button games like NARC), i would use 1237. that makes it so that buttons 1-3 are always the same, so you hand always stays in the same position. I'm not sure about the curve, i think it will be more confortable but I am not sure how to space out the buttons equally. with the straight layout it was easy to just measure 1.5 inches and drill another hole..the arc adds a bit of difficulty..i guess i should just find a layout that works and make a paper template for drilling.
anyway, what do you guys think of this new layout? is there possibly another option that I am overlooking?