Weak point in this analog system ?

Ad010685 -- phono first.
You mention (Marzio's?) Euridice and a Linto... If it's the Euridice I think it is, it's in a different leadue than the Linto -- excellent though the Linto may be.
Since you're diy-ing I would suggest that the Euridice, with a little tinkering to add a phono stage, {perhaps going overboard using a LR circuit with suitable gain stages} would easily better the Linto and most other phonos by far. There's a chap in Italy who offers matched LR de-emphasis circuits called Stefano Perugini (PAEng design). Can't find his url.
Also check out T Loesch's toccata.

That will give you body, texture and detail, etc.

TT: the Scheu TT is very good IMO. Keep it. OTOH I don't know about the mechanical compatibility of yr arm (BTW, I like that SME) I have always listened to Scheu + unipivot (Tacco, Morch, Clearaudio).

I would agree that the Denon, outstanding for the price, can be bettered (for a higher price).
So, keep it and work on a good phono stage.

Gregm, can I get your opinion of how the Tacco stacks up against other arms like the Morch & Clearaudio? Also, what were your overall impressions of

I'm very happy with the Premier/Tacco combination, I just have never tried anything else on the table.

The Tacco was slightly better (slightly more neutral & slightly more extended -- probably better mechanical compatibility) than both the cheap Morch and the Clearaudio. OTOH, the beginner's Schroder was better. Please note that in these cases the cartridge used was one of the new line Clearaudio MC that costs $~500. Sorry, don't remember the model. The Scheu had the big platter.
There's s/thing missing in yr post?

Well, considering the Denon is part of this discussion, I think I'll jump in! You wrote "I heard the same set up with a Audio research ph1 phono stage and to my memory the sound was thicker and more real." Sounds to me like you like the tube sound, and so this is the thing lacking that you seek. I don't agree that the Denon can be bettered for greater $$$, there are things it does - drive, mid-bass, tonal balance, musicality/gestalt/PRaT - which it does better than any other MC, regardless of price, which is why it has Classic status, it's not just a matter of value for money but of unbeatable strengths (sorry Raul ;-)). Yes it can be bettered in terms of frequency extension and detail (where it is still surprisingly good, however), but these are more in the way of unnecessary extras rather than substance, musically-speaking. I don't think you are stupid at all to be in love with the Denon, this is how if affects many: it appeals to the heart first, like a transducer of music should (not that it is a slouch at the usual audiophile characteristics). Start listening to various tubed phono preamps, and don't listen to those who advise you to abandon the Denon.

Bravo Johnnantais!!

My Denon DL-103D gives up almost nothing to more expensive a famous cartridges when it comes to terms of sheer musical enjoyment over a wide range of material. It surely gets far more playing time than any of my others (also for financial reasons).

Sure, some have greater detail, focus, air, space between performers, timbral accuracy, etc. All these fine points are better recreated, but when I take my critical listening hat off it really doesn't matter that much. Perhaps it's because I still listen to a good amount of rock and hard rock. I need an all around performer. The Denon can easily go from Black Sabbath to Branford Marsalis and then on to Joni Mitchell. All sound great and the Denon gets right to the heart of the music, as you said.

Is it the best? Definetly not. But, other carts will be sold off long before it will.

***Gregm***

Thanks for your insights on the Scheu Tacco. The arm seems to perform extremely well with my cartridges. I've been considering trying out that low-priced Airtech linear air bearing tonearm.