First 4k Player - Recommendations

[JFS3]

While I have been buying new titles and historical rereleases in 4K I have yet to get a player. Looking to dive in and looking for recommendations. Current Tv is a Vizio 4k M70-C3 and current receiver is a similar vintage Sony 5.1. Theatre area setup with 5.1. Current Sony Blu-Ray feeds directly to receiver and receiver to TV. Looking to get into 4k without breaking the bank. Do I need a new receiver as well? Will the player need to have a direct connection to the TV instead of the receiver? Have traditionally bought Sony but I understand their 4k players have limitations. Receiver is NOT 4k.

Thanks