I've always held that power (features) trumps speed unless we're talking about OLTP. Machines will get faster quickly. Providing a strong platform is more important than being the fastest, today. YMMV.
Perhaps you missed the memo about Moore's Law officially dying, and the fact that speed (as opposed to transistor) wise, we haven't seen any real increase in the past 5+ years and we are not expecting anything much either...
http://arstechnica.com/information-technology/2016/02/moores...
https://www.siliconrepublic.com/machines/2016/02/15/moores-l...