The different models are a bit confusing, but mainly they are just different price /value catagories. One might have more bearings than another, or some other features, but they are the same size in each series, that is a 2000 series is the same size in each "model" but has some more deatures. The 1000 models of the Shimano and others are fine for trout, but if you want something you can use for more purposes, the 2000 models are a nice compromise, just get an extra spool ( some come with it) and you can spool it with 4 or 6 for trout, then just switch the spool to 8 or 10 for some of the larger fish. I have landed a lot of schoolie bass and small blues on a 2000 with 8 or 10 lb test, and also use it in the ponds for largemouth bass. Fin Nor also makes some very nice and reasonably priced reels, but all of the name brands are pretty good stuff.