With little one no 4 on the way I'm going to need a seven seater next year

Love my rs6 but it's the daily and they dont do a 7 seat one, I've been hunting around but can't find a seven seater equivelant

I thought mercedes did an amg estate 7 seater car over 500 hp but I can't seem to find one, suv is last resort ideally want 7 seat estate car with loads of grunt