I like pinstripes, but agree that with your frame they may not be the best choice. Suit fit looks okay. I'm not a fan of such casual shoes with a suit, but Manton does it so who am I to criticise... Personally I'd go for either a dark brown or black oxford/bal. Tie is a tad pale - I'd look for something that gave a bit more contrast against the shirt with a dark suit.
...i wouldn't have thought it is one of my best, but im glad people like it.
And yeah, the pants fit really well. just got them a few days ago on ebay (i was the only bidder)... i was a little worried they would possibly be too small, but they worked out great.
They are a thick, heavy cotton jersey, so they basically feel like wearing sweatpants, and it gave the outfit a really relaxed/comfy feel.