Advice needed on sub $1000 setup

If you don't have room treatment such as bass traps, and you can fit them in to your room, I would put your money there before getting a vinyl rig. I recently did this and I was surprised how good it made digital sound. You can get some pretty nice products that look good and are affordable from places such as GIK. A $1000 won't get you much of a vinyl rig, but it will be enough for some reasonable room treatment and from my experience I know the improvements it can bring to an existing digital based system will be far greater than what you will hear from adding a $1000 vinyl rig. It will be a true improvement, whereas a $1000 vinyl rig will be a lateral move not really improving your system, only adding another medium of playback to an existing system. And it really will make your digital system sound better than awesome.

The Dynavector 10X is a perfect match for Rega tables and arm. It has the boogie factor that synergizes with the Rega kit. You see a lot of 10X's on Rega arms that belong to happy people. The Denon 103 isn't the best match for the Rega arm compliance. It will sound OK, but won't sing. Don't know about the DL160 on a Rega arm. Benz could be good too but I don't know them. Rega cartridges are not good IMO, based on the one I heard. Good list otherwise, but I'd add the 10X to the list. And check compliance of each cartridge against the arm for ideal resonance. You should be able to get a 10X for close to your $300, and certainly worth adding another $50 for. One more thing, I don't know the amp you selected, but if you get a MC cartridge, even a high output one, you better have impedance load adjustments so you can get it down to 1K or below depending on the cartridge. If you don't have MC loading adjustments, I'd get a MM cartridge instead. Your next step, getting a cartridge to match the arm and phonostage, will make or break this rig.