I think the McQuarrie book is excellent. If the topics you need are treated both by Atkins and McQuarrie I would choose the latter, but that is also a matter of personal taste. I grab one or the other if I need to look something up, but overall I have some preference for McQuarrie. Note, that my Atkins edition is an old one, so I cannot compare the latest edition, but judging from his inorganic text (2nd & 5th ed.) I doubt there have been any major improvements.