If you are going to stay with your Rotel integrated, you could get by with the Quad, and its on sale at half the price of the Ascend right now at Music Direct.
Both are 8ohms and sensitivity 87/88 db, so if you’re thinking of stepping up on amplifiers down the road, or maybe even a tube amp down the road, a friend here on the forum has had good results with his larger Ascends and upgrades so far. They have been a great value for many as I’ve read over the years.
The Ascend has the nice RAAL tweeter vs Quad’s new True Ribbon tweeter, may be worth a study. The RAAL is a proven unit it seems.If you upgrade your amp later, maybe the Ascend is worth a closer look imo.