For cutthroat, pikeminnow, or even bull trout, I prefer a spinning reel than a baitcasting reel, which I feel is bit of an overkill. The spinning reel that I use for these species is usually the Shimano 1000 to 2500 models. Shimano Sidestab is a good one to start with, entry level, reasonable price, three ball bearings and fairly durable. Spool the 1000 with 6lb test or 2500 with 8lb test.
The spinning rod that I have been using for several years now is a Fenwick HMX, rated between 4lb-10lb. I've used it for trout, bull trout, coho, pink, pikeminnow, bass. It's 8ft long, good for both spinning and float fishing. If you are only using it for spinning, go down to 6 or 7ft, I think there is also a Fenwick HMX that comes at that length. Berry's Bait and Tackle was where I bought this one, last time I checked there were still a few left.