Hi Hector,
Great questions,I will try to answer best I can.
I went into the upgrades without ever hearing for myself, I just relied on past upgrades with M knowing how satisfied I was with them.

1." Of the three upgrades which brings the most to the party?
In my opinion I believe it is the source the 808v5>808v6
to me it presents more tonal and intricate detail than the v3 to v5. Thatv3 to v5 was a great upgrade, but 5 to 6 I give the ribbon to because it seems to be more revealing. But to be fair I have to count in the SE8000's too. I did not run the 808v6 with the 8000.2's, in all fairness only after the upgrade.

2. "8000.2 to 8000SE Redbook CD"
I believe I posted awhile back a few days ago at how pleased I was with the performance of the 8000.2's with RBCD's they are no slouch with the 808v5 this is before my being introduced to the capabilities of the SE's they are very, very responsive.I place the big difference between the SE's and 8000.2's with the new amplification and especially the new tweeter also EBA within the speaker it seems more responsive than within the 8000.2'S setup, it is truly the secret sauce. It has given the speaker the ability to start and stop the woofers so they don't overrun into the other frequencies and muddy the sound,(I did not notice as much before the upgrade, just excellent engineering software) allows the speaker opportunity to give an excellent sound field. Symbols and tambourines have a more life like realness to them. I am doing my best to describe the overall appeal of this upgrade which is not subtle it really makes RBCD shine to the fullest.

3.Now to move on to MQA.
Not that this is not highly present in RBCD but to me it boils down to placement and imaging, it is hard in a way to describe as much better, when all of the parts of this upgrade are working so well outside of MQA. M has done an unbelievable job in bringing this system together in a high-fidelity that no parts actually in my imho out-shines to a great degree the other.
As I was saying placement and imaging is so coherent with MQA
The space between the instruments with the feeling of nothingness behind them. Kind of eerie in a way but each instrument is distinguishable to it's self. This is nothing like I have ever heard before, different but new.

Overall, I would say that to me this is the most revealing upgrade that I have ever done, it is like when I made my move visually from CRT to DLP. It is just that revealing. There is no way I can capture what I hear and place it into words, you are going to have to hear it for yourself. I am very very happy with my decision to do the upgrade. Expensive yes, but to me the results are very much worth it, if one can, I highly recommend.
I must also add this, I do have my system in a dedicated room so others may get different results per their surroundings. And
I say again Meridian should be given an Emmy for their innovation and sound delivery.



861v8, 808v6, 800v3 w/LPSU, HD621, MD600, DSP8000.2USE, DSP7200.2HCUSE, DSP7000 (rear)w/2 Revivers, DSP3300 (sides elevated), Seaton Submersive HP Subwoofer, Sim2 3000e, Oppo BDP-103, Stewart Film Screen JK Gray Hawk Grand Cinema R/S 115"Diag w/masking.