Speaker Recommendation up to 70k

Be prepared to make adjustments, regardless of speakers chosen. You are seeking speaker following all the rest of the system. That is not ideal, but it is part of the audiophile experience eventually. Do not hold your hopes up so high that if it's not sensational, you will be disappointed. I could make a system with shortcomings with any of these, or a seemingly flawless system, if I had control of the components and cables selected. But, when given one set of gear preselected, there is no telling which outcome would transpire for any of these transducers.  No one here can answer your question, and if anyone claims to, I would not heed their opinion.   :(

A bit more information such as what speakers you have owned, or currently are using, as well as your preferences in sonic attributes, would assist the community in making recommendations.  

well money is relative, $70k is not a lot of money to some people and to others it is unattainable. 
Anyway people really need to know amp your using. Can it handle a low impedance hard to drive speaker?

I am very familiar with a pair of TAD Reference One running on Vitus Audio solid state amplification and to me they are by far the best speaker that I have heard. I have been fortunate enough to have listened to speakers that are well into the six figure range and the only other thing that comes close to the TADs is the Vandersteen Sevens (heard on tube, could be an even closer match up on solid state).

I think either represents good value in that upper stratosphere but the TAD is my winner between the two.

Bob - My second choice are actually the MBL, but they require a timeshare on a small hydroelectric dam and the right room..

The highend broker is excellent advice…..

When you say a Swiss front end, do you mean it sounds neutral?