Advice on speakers for Pioneer SXS-30


Hello. I will be receiving the Pioneer SXS-30 amp tomorrow and I have a question about which speakers I should use.
I am a beginner and will be setting up bookshelf speakers for the time being.
I have 2 Sony 50 watt speakers at 6 ohms and I also have 2 Pioneer speakers at 50 watts at 4 ohms.
Does anyone have a suggestion for what would be most suited for this amp?
I will be connecting them for movie viewing and playing the odd vinyl here and there.

Cheers and thanks in advance.
iwanami
Hello. I will eventually get some decent speakers but for now which of the top two I suggested do you think would be most suited. Also advice on better ones for purchase at a later date. Listening to 70’s rock mainly.
I live in japan so the room size is fairly small. About 6 x 7 meters.