I'd recommend you don't get Pokemon Black or White if you dislike the new Pokemon. Before getting the National Pokedex, new Pokemon are basically all you can find. If you'd like a little more of an up to date game while still being able to catch the first 150 easily, I'd suggest FireRed/LeafGreen or HeartGold/SoulSilver. Assuming, of course, that you don't have those already. FR/LG are remakes of the generation I games, but were released in generation III, along with Ruby and Sapphire. Much later in the game they have Pokemon which were found in generation III, but for the most part, it's the first 150. HG/SS are remakes of the generation II games, but were released in generation IV, along with Diamond and Pearl. They've got 493 Pokemon in them, so it's probably not the best choice, but if you can't find FR/LG, there's nothing better than going through Johto and Kanto, even if there are some later generation Pokemon involved.