Responses from donvito101

Switch preamp?
A tube preamp would be the way to go. Since you have found memories of Conrad Johnson, why not go with that brand ? 
Advice needed
Here ya go! 
$3000 Speaker Search
What happened to your $3000 budget? The Spendor D7 is $7000 and the others that you are checking out are over 3 grand! 
Looking for suggestions for a new (to me) pair of high efficiency monitors
+1 yogiboyYou don’t need high efficient speakers in a 10x12 size room. The LS3/5a is a perfect speaker for your application.  Keep away from any ported speaker! 
$3000 Speaker Search
Spendor A5R would be a nice fit. I’ve owned Spendor floor standers in the past and they always sounded great! 
Looking for a monitor with great midrange
@audiotroy The OP has a 1K budget. Why are you recommending ATC and the others? 
PLEASE match Advice Pass Labs X350.5 (20k) to Hovland HP-100 (2500ohms) Miss-match ???
See if you can find a used Manley Jumbo Shrimp, it has a real low output impedance! 
I Find Primalunas Ugly. How about You? Is there an alternative?
Check out the new Western Electric! 
Is it possible to buy a decent tube amplifier in the $2000-3000 range?
This should fit the bill! 
Missing shipment
If USPS shows that the package was delivered then the seller is off the hook. It is up to the OP to do some detective work as to find out what happened. BTW ,insurance covers for damage, not for a delivery that was shown being delivered! 
Why do better MC cartridges cost a fortune?
Your’re not going to put a $100 Shure on one of these! 
PrimaLuna Dialogue Premium Preamplifier. DESTROYS SPEAKERS!!
MR.OP,Come out, come out, wherever you are! 
Any new turntable brands we should pay attention to ?
Bryston! First turntable from an older company! 
Forgive my ignorance. Now to start over. . . .
Gem Dandy! 
Tech That Flopped!
Any current LS3/5A type speaker does not make that claim. BTW,please name the ones that do!