If your buying a rod for trout then go with a 5wt setup as well. this is a good all around rod weight for trout. that is unless your in a lake where 5+ is the norm
I would respectfully disagree with HOOK's 5wt recommendation... he is definitely right in that a 5wt rod is probably my favourite "pure" trout rod for BC, but in your situation a 6wt is probably the best all-round rod, in my opinion. It's still light enough to have fun playing smaller rainbows (under 14 inches), but is strong enough for bigger fish (8lbs+), and will really help punch casts out on windy days when a lot of 5wt rods may have difficulty.
Plus, as an added bonus, if you ever are fishing for pink salmon or coho, a 6wt rod would have enough backbone to handle such fish (although a 7wt would be better, and if you know you'll end up with more than one rod, a 5 wt and 7 wt would be a good one-two punch!).
Good luck!
Tex