What to make of my system?

Your Theta Pro Basic-II should not be underestimated.
This unit was part of a system which provided sound to make time stop (in dweller's world).
I've had only a handful of these moments in my 16 year audio career.
My point is, a great piece of audio equipment stands the test of time.
Don't assume because equipment is a few years old that it's inferior to current offerings.

Digital gear, just like your home computer, has advanced by leaps and bounds. A DAC that is 15 years old is as obsolete as a computer running Windows 3.1. A current mid priced CD player will easily outperform mid priced digital gear like your Theta from that era.

That said, I find it curious that you find your digital gear to be close to the performance of your analog. The logical conclusion is that the analog gear it is not properly aligned or it is worn out as suggested above.

I do think it can be better, and the new cart should be exciting to try, but the thing is........it really sounds very good! And I am usually the first to say it couold be better, if you look at some of my postings it will be clear that I find alot of things I would like to improove.
I am getting tons of detail with great bass and no tracking problems with the high frequencies, so I am just a bit puzzled that the digital sounds as good as it does, ofcourse this is recording dependant.
In close all I know is that as good as it sounds now, it will be very cool if it can only get better. The only thing I can add is that I heard a VPI Aries with I believe an SME arm and I cant remember the cart, but that must not have been exactly ideal because mine tracks much better and is alot more pleasing...more info to come but thanks for replies.

Dweller hit the mark, Herman is 100% wrong

Analog isn't better when you have the right digital gear, one thing you lucked into is very good speakers, when your speakers aren't tipped up hot rods and your amps aren't glary over driven tubes you might be onto something just right. Fact is your preamp isn't one of those impressionistic RIAA machines that give you a 6db cut in the treble and boosted bass its an honest preamp. Your "problem" lies with your equipment choices and the perception that analog is sooooo much better when in fact its old and obsolete.

My Sonographe SD-1 Beta was everybit as good as my SOTA/SME4/GRADO/Motif MC7 system in 1991. The SOTA hasn't been improved since then neither have your records. :)

Herman said:
"Digital gear, just like your home computer, has advanced by leaps and bounds. A DAC that is 15 years old is as obsolete as a computer running Windows 3.1. A current mid priced CD player will easily outperform mid priced digital gear like your Theta from that era"

I've read that many times before, I've not found it to be true... The only "leaps and bounds" I've heard are in recording quality of some CD's...very good when they apply the effort and technology.

Dave