Agra Fort is still boss, the Sunday buffet comes highly recommended, even the takeaways are great as you get a complimentary beer. Obviously being on this site I only have takeaways once in a blue moon!

http://www.agrafortonline.co.uk
The Port is weird, not much of a destination, if you last went yonks ago then there is a big fairly soulless wetherspoons around the corner.

For the old traditional curry, Agra wins, but again depends if you're limited to Chester itself or the surrounding area.

In Chester itself the Chester Tandoori is good, buffet on a Sunday.  For kerala style Koconut Lounge is nice.