Hi Donya,
I've researched the decking available here to quite an extent lately, and Trex is still our best choice, I've never seen anyone carry TT around here, so it may not be availanble in Canada. Their mold issues were abundant back in the early 2000's, to the point a class action lawsuit was filed, but this is not supposed to be an issue anymore since they changed the process.
I have a couple of other choices that look identical to trex, but their details in paperwork leave a lot to be desired - as well teh warranty period is half that of trex.
As for the aluminum railing, it is so much nicer than the composite, primarily because it is not as chunky looking, unfortunately, the price starts equal to composite and goes up from there. 1/3 my total cost will be the railing - ouch!
BUT - I'll never have to refinish anything, so all I have to do after building it is build a wet bar on it with a beer fridge, pull up a chair and relax!
Hey! - Maybe I'll rewrite my article then!!!