"Complicated" can have quit a broad definition. More information would be useful, such as:
What are your speakers
What is your music / movie ratio
What other source components will be connected to the new receiver
Are your digital & analog connection demands met now, & do you have room to grow
There are others, but it is early & hopefully you see my point. Oh, if Sony receivers are not well thought of on AVS, then. . .
I hope you find the receiver that fits your needs.