Thank everyone's kind suggestions and sorry for my late response as I was travelling in Europe.
Just a quick update I did get the AX-7e together with the QB-9. I have to say I am so impressed. The biggest improvement is background is darker and noise level is lower. and I am enjoying the sound very much. But to be fair with the M3, I believe it has some issues with the capacitors in the signal path or the pre-amp tube and should sound better after proper serviced or even fine tuned. Unfortunately, I am in California and MF has suspended the fine tuning service out side UK. I was thinking to send the amp to Rick Walker in NC for a similar fine tuning service. But now since I have the Ayre set up and I might give it a second thought and might put it on sale soon.
Just a quick update I did get the AX-7e together with the QB-9. I have to say I am so impressed. The biggest improvement is background is darker and noise level is lower. and I am enjoying the sound very much. But to be fair with the M3, I believe it has some issues with the capacitors in the signal path or the pre-amp tube and should sound better after proper serviced or even fine tuned. Unfortunately, I am in California and MF has suspended the fine tuning service out side UK. I was thinking to send the amp to Rick Walker in NC for a similar fine tuning service. But now since I have the Ayre set up and I might give it a second thought and might put it on sale soon.