I'm gonna agree with
@Andyshine77 on this one. If you wanna make a trip to Missouri I have every saw you have listed but the 590. Here's my break down. If your leaving it stock. Your not gonna beat the 6100. The echo will be out last unless your goin after the 620. The 2258 is a fantastic saw but will not even bite on the 6100 power butvits lighter. By a pound I believe. But if your worried about weight. Trust me. The time spent using the saw will be much less with a 70cc class. I hate bending over. So my saws of choice are always the big 70cc class with a 28" bar and the 50cc class with a 20". The top of the 50cc class IMO is the 5105. Then the 70cc class well there something I like about several. Old school 372xp. Lightest of the class and run dam hard especially built. 460 stihl. Almost bullet proof but a lot rougher AV. The 7910. Yeep there's the ticket. All good choices. Put them in your hands and see what ya like.
Best of luck in choosing one. As you didn't pick a bad one.