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

I just received a AI L3B line Stage PreAmp, after an unreasonable 12 week buildout. It is georgeous, inside & out. In my rig (a recapped Conrad-Johnson Premier 11a, Martin-Logan Aerius’ speakers) except for the waittime, I am very happy. 

I've been waiting for my L3B since March. I'm due soon but, man, the wait is damn near killing me!
Glad you're happy with yours!

This thread brings back so many memories. I had a Modulus 3 w/phono that I was very pleased with but it started getting noisy in one channel. I re-tubed it but that didn't solve the problem so I called Art and he said to send it in, which I did. After several MONTHS I started calling him every week. He said his tech was on vacation, etc., etc. Finally after 9 months, I guess he got tired of me calling and sent me a brand new 3A with gold phono board at no charge. It was a nice upgrade and worked great. When I got the upgrade itch, I replaced it with an ARC, which I love  but kinda miss the Modulus and phone calls with Art.

Arts biggest downfall was customer service. 

I emailed AI yesterday and asked a question and I got a response from Art the same day.