Need input on new speakers

Also, the OP is not using a low-powered tube amp and the Rotel he’s planning on using puts out 120Wpc into 8 Ohms and 200 Wpc into 4 Ohms, which is more than enough power for these speakers. 

Understood, @soix , just wondering about the statement the Stereophile reviewer made was all.  

@immatthewj I agree with you. Personally I wouldn’t use a low-powered tube amp with these speakers even though you could. The amp will be pushed fairly hard, which is never optimal for it to perform at its best. Better to use a more powerful tube amp that can work further below its limits IMHO.

I personally am a fan of KEF speakers. They are very clean sounding with excellent reproduction capabilities.  The "Q' line is their lower end but blow blow away speakers 2 and 3 times their price. As they just released a new series of "Q"  speakers many of the previous line are on sale directly from KEF. Crutchfield, Amazon & Best Buy have them for the same price with free shipping. The Q 350 is a Stand speaker that consistently gets excellent reviews. Their tower speakers are the 550, 750 & 950. If you can spring for 950's go for it. I have the 550s with a KEF Kube 10" sub. You really won't need a sub with the 750s & the 950s sound like you are in a concert hall. 

I also think the higher end lines of POLK are great sounding speakers for the price, but all things being equal the KEFs are audiophile quality and a great bargain at the reduced prices.

I have owned multiple KEF models. I'm currently enjoying the new Q Concerto Metas. They are very solid for rock music, with a very warm and robust bass - especially when coupled with a subwoofer.

That said, for the OP's needs I second the recommendation for Zu ahead of anything by KEF. Both the DWX and DW6 would be perfect for the OP's setup, and I can attest that they most definitely will rock. The DWX would probably be ideal. Have heard these speakers in several settings and they are like modern-day Cerwin-Vegas. Super easy to drive, powerful bass, and they will crank. Sound good, too.

When I demoed the KEF LS50 (before meta), I also demoed the KEF R700 floorstander which sounded similar but with bass extension. So maybe a used KEF R700 here .  
 

I demoed multiple Zu but it never resonated with me- from the many forum comments, seems few resonates with its sonics so is highly subjective.  Zu is typically highly efficient so caters more to those with lower amp power.