Yeah, I'm going to chime in here recommend looking at a Sthil MS 290 or MS 310. Now, these are the same saw, but only with different size displacement, so the 310 has more power, but weighs exactly the same. But it'll cost a bit more too. Pretty sure though it'll come in around your $400.
I've got to be honest, if your husband is used to using two Poulans that he hates, moving to the Stihl 290 or 310 will be far and away more enjoyable. The votes for the Sthil MS 361 are well-founded. I've got one, and I love it. But it's beyond your price limit for just cutting firewood, especially with what he's used to, the MS 290 or 310 (and I have owned a 310 in the past, so I can vouch for it) will do him fine.
They'll not be able to pull super long bars, and I'd keep the 290 to a 20" and the 310 to a 24". But to be honest, not many $400 saws will have the power to pull longer bars. And you can do alot with a 24" or even 20" bars. If he's regularly cutting wood upwards of 40"-50" well then, he's quite the firewood cutter and needs actually a couple of saws.
You're from Cloverdale? I'm originally from Leavenworth, down on the River, and graduated high school from Plymouth, up by South Bend.
Welcme to AS, and be sure to let us know what you choose.
Jeff