There’s a multitude of options depending upon your budget, preferences for new vs old (or modern vs vintage), listening preferences and room size. The 701 is a very clean, accurate and high fidelity amp that will drive most speakers very well, so it leaves you with a lot of options.
[gets on soapbox] In most cases, when it comes to feedback re: suitable speakers, you will get relatively limited and biased feedback from people who own a particular speaker and enjoy it, rather than feedback based upon experience across a wide range of comparable speakers on the same amp in the same room. In essence, the sample/data pool is small and not comparable. It’s not dissimilar to the feedback posted when people ask for feedback on whether whether they should buy old vs new Sansui amps - unless those providing the feedback have tried Sansui amps across the years, have identified and can articulate the differences, the feedback is again subjectively biased based upon ownership of said amp and needs to be considered accordingly. [/kicks away soapbox]
Now, there’s nothing inherently wrong with either of these scenarios - it holds true across many aspects of our lives - but one should always take this into consideration when evaluating any advice received.
What’s your budget? What music do you listen to? Do you listen at moderate or (subjectively) loud levels? How big is your room? Old vs new speakers? New vs used?
The Ascends are well regarded, high fidelity speaker so I suspect you’ll want something with at least the same sonic performance, but with the ability to perhaps go a bit deeper in the bass and perform well in \ larger room?