Some kind of teak wood would be best. IPE is what this looks like. Please purchase responsibility as it is harvested by clear cutting in some areas. FSC is best.

I'm a Certified installer for Trex decking. Trex Transcend is encapsulated board, with a finish that resists staining, scratches, mold and has a high definition wood grain surface. I don't know what you did to it or whoever worked on your house did something to it, but Transcend decking does not need staining or painting and the protective shell protects decking against fading. Trex Transcend and a few other Trex decking products like Trex Enhance, and Trex Select, they cannot be painted or stained. The only thing can be painted is Trex Transcend White Railings and you should only use light color paint. If you use dark colors, it will absorb heat and it will damage the surface and you can kiss your railings good bye. Also high quality fast drying primer should be used and you have to use Oil or Water based exterior paint and most importantly surface prep is the the key. When it comes to painting specialty surfaces like Trex Railings, hire a Pro to do the work. With that said, if you installed Trex yourself, you have to go to the store and have a Trex representative come out and check your deck. They will determine if loss of color fading was due because of negligence or not. If its a material defect, they will cover the material cost. If you had a Certified contractor do the work, they will cover material and labor. Call your contractor and he will get a Trex Rep to come out within a few days. Good luck

Why don't you look for a hutch at a consignment furniture shop. Plenty of people that have had hutches are now getting rid of them in favor of a buffet. Then you can see the quality of wood that has already stood the test of time. Wood is far less likely to warp or stain than the fake man-made products that so many of the furniture companies are putting out now. EA, PB, etc.

HDF is High Density Fibreboard as opposed to MDF which is medium density fibreboard. If sealed properly it can be used outdoors as panels set within hardwood frames. Better still is marine grade plywood