Audible Illusions modulus 3A, what would be the next level of up grade?

You may want to look into the Aesthetix Calypso. A fantastic preamp from a great designer.

Backert Labs.

The Calypso was on my short list and there is one available locally.
It is highly regarded in the forums. I did have direct discussion with a couple of people that have owned one and they said they were a little noisy. Noise bugs me. I should still check it out.

I haven't listened to one in a long time, but my impression is that the 3A is very good. It may be hard to beat for near the same kind of money. It does have a ton of gain which isn't an issue for vinyl, but might make finding a good match amplifier wise more important than finding another preamp that is "better".

If used as a line stage