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
Thank you for the reply.
Yes someone else suggested these. Are they really that good for the money? I've heard many good things about them.
@iwanami  - Either of the speakers you mentioned will work. It's simply a matter of trying each and deciding which sounds better to you. 
Thanks for the replies everyone. 

Thanks for the reply.

I am now thinking I will just go and grab some new bookshelf speakers.

Something a little better than the ones I have. So hard to know what they will sound like though.