I have a 346xp and a 359 you can't go wrong with either, 346 will be lighter but it depends on what your intended use is (ie. what type of wood and how much you will use it) . 18" is about max on a 346 but some use a 20" with good results. 20" on the 359 but you have the option to run a 24" I personally run a 16' on the 346 and a 18 or 20 on the 359 with great results. I am sure Saw Troll will be on shortly and give you the specs. He is the master when it comes to that stuff listen to him. Sawing redneck likes the 350 and has had good results with it. don't count out the Stihl 026 and if you can strech it a 361 is a great option so sit back and wait, more to follow! Also what Urbicide said.