The XDS K3 looks good. They do build solid frames but because of human's chase for branding, they are not popular compared to the Terns or Dahons. The XDS K3 is more than enough for the job that you described. Like I said, if branding is not an issue, or the size of the fold isn't, it is more than enough.

BUT !

If you, one day will to join a biking group, riding here and there weekly, that's where the problem comes in. This is a big IF lah! Peer pressure will make you want to change bikes, not the performance of the bike or the quality but usually it is the peer pressure!