A $1000 budget will buy you a lot.
First, look at the types of games you like to play.
On your current pc, run this test:
Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.
Your I7-930 has 4 cores, but 8 threads. It has a passmark rating of 5139 and a single thread rating of 1218.
You will find that few games can make effective use of more than 4 threads.
You can test out this assertion with this test:
Experiment with removing one or more cores/threads. You can do this in the windows msconfig boot advanced options option.
You will need to reboot for the change to take effect. Set the number of threads to less than you have.
This will tell you how sensitive your games are to the benefits of many threads.
If you see little difference, your game does not need all the threads you have.
In general, fast action shooters need a fast graphics card.
strategy games, mmo and sims need fast single thread performance.
Multiplayer games with many participants like many threads.
What is your current monitor?
Are you looking to change out your monitor?
What are the rest of your current parts?
Do you need to change out your case?
What is the make/model of your psu?
In what way do you feel that your current setup is not doing the job?
I would address that first.
I think I would consider the monitor upgrade first.
Larger is more immersive. 30" or even a 35" widescreen.
Do you need the good image quality of a ips 178/178 screen, or would a faster tn screen be better.?
Your current GTX1050ti is a very nice card for what it is and will support any new monitor you want to buy.
You may even find it adequate for mmo or strategy games.
If you want a cpu upgrade, I do not see any good upgrade for your current motherboard.
The strongest might be a I7-990X with a rating of 9066/1509
You are looking at a modern intel 9th gen or ryzen processor.
Old tech is usually more expensive unless you are shopping used.
I would not go that route.
In addition, you will need a new motherboard and 16gb of ddr4 ram.
Ram might be $130, a motherboard might be $150.
A I5-9600K will cost some $250 with 6 threads and a passmark rating of 13446 and a single thread rating of 2677.
A 12 thread ryzen 2600 mentioned above may be around $200 with a passmark rating of 12544 and a single thread rating of 2007.
Either would be a very big jump over your current processor.
You can go higher, but you start to get diminishing returns for your incremental dollar.
Somewhere along the line,, budget $150 or so for a 500gb ssd.
I like the Samsung EVO units for reliability and performance.