I have been using my Dell Studio 1749 (Core i5 2.27GHz, 4GB RAM, 500GB 7,200RPM HDD, and ATI graphics card) for about 6 months now, and it’s still going strong. This is the first computer I have had that’s not part of the famous Core2Duo range, and I have owned this computer longer than any other (even my Macintoshes started flagging at 4/5 months).
Now, yes, I do use my computers all the time, and yes, a desktop would probably be a better investment for me, but this Mobile i5 is super fast and has yet to even lag with anything I do to it. Hats off to Intel there.
Just the other day, I had a Virtual Machine open, a video editor, Web browser, and an email client. A usual Intel C2D freezes at this point, trust me. The i5 just did what it was supposed to do, and it did the same the day I got the laptop.
In conclusion, the i5 is one of the best, most durable and fastest laptop processors out there today. It could handle anything you throw at it. So, time for an upgrade?