Love widescreen, only major concern is the higher resolution ties you to a more powerful GPU. For instance, the roughly equivalent 4:3/5:4 aspects translate to 16:9/16:10:
1280 > 1680
1600 > 1920
2056 > 2560
All of those resolutions differences require a good bit of pixel processing requirements, so if you're planning to make any upgrades make sure your video card is up to the task.