You may want to go with either a 6 or 7 wt. rod for trolling and casting.
IMHO I don't think you can beat a Temple Fork flyrod for the money. http://www.templeforkflyrods.com/rods/series1.html
As for reels I think it's just a matter of preference and what you want to spend. I don't think a high end fly reel with adjustable drag is as necessary for FW as it is for SW. Mainly due to the diffferences in environments and heavy drag required for SW fish. But that's just my opinion and I personally like finely machined reels.
I'm just a rookie trolling in fresh water. The last couple of years I have been using my SW striper rod and reel (Sage 9wt with a Teton reelwhich is overkill) with a Cortland 425 gr. sinktip but it's been effective at Quabbin.
I'm thinking of trying my old Fenwick fiberglass this year with a full sinking 6wt line. As my 4wt with a sinktip just doesn't seem to work for trolling.
