Responses from mesch

Music lover or audiophile?
Few music lovers are audiophiles. To be an audiophile and not a music lover seems senseless.  
R2R Dac choices.
99% of my music is CD based, either as disc or AIFF file. I am interested in both the Orchid and the Mirror Audio. I use a tube preamp however.  
Vincent Audio tube preamp SA-T7 & SP-332 power amp
I believe the tubes are in the amps driver stage. The amp is solid state, running class A for the first 10 watts. I owned a Vincent 226 MK integrated and wish I never sold it.  
Again, what is the room size? It is easier to purchase stand mounts used (shipping). Can be more easily sold (again, shipping). 
Proac Tablette 10 Signature
At your budget I would go with an integrated. If you would consider used, maybe a Vincent Audio SV 236 or a Pathos Model One MK3. Both are hybrids with tube pre and SS amp, smooth sounding.  
Need advice on what amp to get under a budget.
What sources are you using?In addition to the aforementioned, I can recommend the NAD 326BEE (50wpc) and Yahama A-S701 or 801(both having phonostage and digital inputs and provide 100wpc, the 801 has additional USB digital in). The Odyssey in not ... 
Cambridge Audio Azur 740a paired with Dali Oberon 5's
I agree with noromance, if it sounds good, playing to the desired loudness level without strain then paring is fine. A more definitive answer would require more information. How large a room? Do you know the nominal and lowest impedance of the Dal... 
Help with room treatment?
Sound absorption panels at reflexion points, behind speakers and behind listening chair will help. Also bass traps in corners behind speakers. Check out ATS Acoustics for DIY products. I made 2x4' panels from their Roxul Rockboard 2", burlap fabri... 
Well ... The Lightbulb Just Went On!
Given that the electronic parameters between output and input of any two components differ, it does not surprise me that one might find different ICs to work best between them.  
MORE Esoteric problems
I own a pair of Esoteric MG-10s. My grandson pushed the tweeter dome in on one. I called Esoteric and was told to contact TAD Electronics. This I did and got hold of Sal in service. I was told to send the damaged speaker to them and they would rep... 
Questions on next steps with my power amp
Ok, so you want to play records, CDs, Tapes (cassette?) and stream from computer. This is no problem as there are many integrated amps (amp + preamp) that would allow for this and fit into your budget. Some have internal DAC, some have internal ph... 
Questions on next steps with my power amp
Millercarbon has provided you with much good advice. I have a couple questions:Have you put the system together as is? The TT, Onkyo, and Klipsch speakers. How does it sound? Are the speakers ones you want to build a system around?  
Good starter amp recommendation
Since you are willing to go with a 2-channel system, a wise decision IMO, purchase a quality 2-channel integrated amplifier and save any funds from the remainder of the $1000 for speaker upgrade. Consider using digital PCM output from TV for movie... 
Near-field speaker placement
I don't believe a 3-way speaker will provide any advantage in dispersion over a 2-way speaker. There are many excellent 2-way speakers that provide a wide soundstage that can be had for $1500 (new or used). I use Esoteric MG-10s, 7 1/2" 2-way spea... 
Moderately priced audio
One possible issue with the stereophile survey data is that it is likely that those readers having lower cost systems were less likely to respond. Would be nice to know the distribution of the data. I have had a subscription to Stereophile and TAS...