I never realized how often you use the letters u and m especially. But also broken is j, ', 7,and :. M is the worst because half the time it was shutting down my window.
for $600 you can get a really decent laptop. My Laptop was $375 and is a year and a half old. I run Lightroom, Photoshop Elements 12, and Premiere Elements 12 on it as well as several computer games without issue. For $200 more you could get even more power.