Are you still in the planning/design stages of your kitchen ? If so, and you've got the opportunity, you might think about raising the cabinets above where you intend to place the machine. If you can do so, it largely eliminates any heat/steam issues.
I refitted my kitchen a couple of years ago, and designed this into it, along with dedicated water/power/drainage.
I also chose aluminium/glass fronted cabinets above the coffee area, but this was more for aesthetics than anything else. Also the cabinet above the coffee area has a glass base with integrated lighting.
It works out very well.
(Apologies for the very poor picture quality)