I would advise moving away from integrated amplifiers unless you plan to sell it for good money, and upgrade down the line.
Inside, no matter how well engineered, small gang errors and noise accumulate, and directly impact signal fidelity. In my almost 25 years of experience with audio systems, I have never heard an integrated amplifier that was able to outperform separates in realism, dynamics, transient response etc. Integrated amplifiers are limited devices by design, and cannot be better than a two box solution.
Go for a preamp + power amp for the best sound quality in home audio. Otherwise, it's going to be a compromise that you will live to regret, eventually. Better to spend the money now than wait.

