Improve sound

I have a pair of martin logan 40i. Blusound node most recent version. Anthem mrx 720. I have the speakers connected with bi wire blue jeans speaker cable. The blu sound via optical cable.  I have about 1000 dollars.  What could I upgrade.  Thought about getting an amp like the parasound 23+ or upgrading the streamer to a cambridge. Please I would love some help/suggestions

There are about 100 ways to go.

• simplicity: TDAI 1120 (but that breaks the $1000 budget)
• active speakers and get rid of the cables and amps (also breaks the $1k budget)

Personally I would save the $1k and give it some thought as to the outcome.
Saying one wants “better”, sort of demands some idea of what better is, so we can go about getting towards what better is.

What is it that you do not about it like currently?
How is the current system less than ideal?
Which of your system components do you feel are keepers?

I'm (sort of) with @holmz . For $1k, I think you can make some sonic changes by replacing something, but it may be the sort of thing you like at first but then later realize it doesn't really allow you to enjoy the system more.

You did not mention your room.  I would think real hard about the room, speaker placement, setup, etc. and fiddle with that.  You may find the need to spend some or most of that budget on some treatments or other things relating to the setup, and if there is improvement to be made in terms of setup, it will vastly outstrip what you can achieve by dropping $1k on equipment given what you already have.

Yeah - the streamer, DAC and amp, sort equals a TDAI 1120… and that also tackles some of the room issues, but indirectly so.

But so does active speakers.

It is easy to become emotionally attached to speakers… and base a system around them.

At some point we need to use some objective reality to determine if the speakers are worth keeping, or are the long pole in the tent.
(I do not know much about those ML speakers, and am speaking of my system here.)

…The athem does have dac internal.  It's a AKM 4458 DAC 32bit 758. So would a dac still help.  I do apologize if my post causes a well why did you not tell us that moment.   I go to a lot of symphonies and I love violins.  Some times when I playAdagio for Strings Op 11. The high frequency parts sound harsh instead of clear and buetiful.

The Anthem doesn’t appear to have a headphone jack… but maybe some high impedance ear buds could hook up to the RCA outputs?
If so i would try to see if that is also not great on the violins.

if it is good, then it is not the DAC in the anthem.
And then it must be the speakers or the amp powering them..

Borrowing an amp to go from the pre out to the speakers would be a dandy data-point.

(But my impression is that the Anthem and the speakers seem like they should be pretty good.)

…
I do apologize if my post causes a well why did you not tell us that moment.
…

Threads evolve. Hence I would not worry.

One of the best investments in sound I made that allows me to utilize whatever my current setup to it's fullest was the purchase of a dbx Drive Rack PA2 along with a corresponding calibration mic.. It's basically automatic in set up and the results are phenomenal Of course the better the equipment the better the results. 

And the TDAI 1120 has that inside along with the amp, DAC, and streamer.
Which as I mentioned before is a bit beyond budget… but the separate things all added together end up being the same cost.