finding the weak link

I have been debating whether to post this and decided that the experience and insights of you all would be very helpful.

I am using primarily an Aurender A10 and Dr Feickert turntable as my sources with a Prima Luna Dialogue premium integrated amp (mostly using KT150's)  and Vienna Acoustics Liszt speakers. To upgrade my system further my thought was the the Prima Luna is the weak link. Any thoughts? If you agree, what are your thoughts for a replacement?

Thank you!!