About the quality. If you don't believe me about S76 quality please read this https://www.reddit.com/r/linux/comments/48y2db/system76_lapt... maybe that will change your mind. MBs are not perfect (non laptops are) bud they are so damn close (depends on what you need). If you want solid laptop you should really look mostly in to MB, Thinkpad series and XPS series, depends on your requirements (wants look and HD speeds? take MB, wants upgrade your laptop in the future? take Thinkpad or XPS)
About the quality. If you don't believe me about S76 quality please read this https://www.reddit.com/r/linux/comments/48y2db/system76_lapt... maybe that will change your mind. MBs are not perfect (non laptops are) bud they are so damn close (depends on what you need). If you want solid laptop you should really look mostly in to MB, Thinkpad series and XPS series, depends on your requirements (wants look and HD speeds? take MB, wants upgrade your laptop in the future? take Thinkpad or XPS)