[nmglug] Computer Recommendation??

Hello NMGLUGERS! I am hoping you can help me with with a recommendation for a replacement computer for our Lenovo T510.  We run pretty standard Ubuntu and do email, word processing, and internet.  We like Lenovo but could consider other options (MSI?).  Hoping to move to a 17 inch screen.  We generally hang on to machines for a long time so will want something with a long shelf life. All thoughts welcome! Thank you! Mike P.S. do I just need to clean the T510 to fix "Fan Error" or do I need to replace the fan?