hockeypuck said:
Need a saw with more power but weighs about the same or less.
I'll assume that you'd probably want to stick with Stihl, since I'm also assuming you have Stihl dealers nearby or else you wouldn't have purchased the 290 in the first place. You've already made one unsatisfactory choice so you know what you need and want, power-wise, and I trust you now see the value in buying the right saw for the job.
If you're looking for a nice bit more power, the 361 is a VERY nice saw. I don't think you'll find anyone who dislikes this saw, which says something! If you're open to a saw that is roughly the same weight, you can get a 440 and have a heck of a lot more saw than your 290. Be sure to order a dual-port muffler cover on the 440 if you go with that model.
So, which to choose? I'd let your usual bar length be the guide - if you will be running a 16 or 18" most of the time, go with the 361. If you're going to run a 20" or longer bar on a regular basis, you'll appreciate the extra power of the 440.