Dolmar P5100-S ($394) - This is the last saw I looked at. The balance seemed really nice on this saw - better than the others. Couldn't beat the weight, and with great power to boot (the best in it's class). And it's got anti-vibration technology (not necessary for me, but a tie-breaking feature). The dealer is 6 miles away from me, and there are two others within ~25 miles should something happen to the close-in dealer. I could see using this for limbing as well as bucking, where I wouldn't say that about the MS-290, MS-270, or 455, and it's not the high price that the 346XP is. I think this is the one.
One other comment - I have an inherent mistrust of any brand I see in a big box store nowadays. I know how these stores operate - they chisel the vendors down on price, and pretty soon the vendors figure out that to hit the cost targets of the big box retailers, they have to scrimp on quality. It's a horrible, downhill slide that I've seen too many times before. Just the other day, I saw Husqvarna in a big box store (I don't go to these places often) and it just ruined my image of their brand. In the case of Husqvarna, if they are not there yet with lower quality, they will be sooner or later. Worse, they may be there today, and I'm making a buying decision today based on yesterday's quality. No thanks. Stihl and Dolmar don't sell through these big box retailers, so I trust their brands and quality levels far more than Husqvarna.