Thats a tough choice Chiho. I have owned the big brothers to the 5.3s, the Sols 6.3s and the Europas. They are both terrific speakers in their categories.For that room size the Europas maybe the best choice.With your musical taste both speakers do very well.
Please don't let the two 5 1/2 inch drivers fool you! Those Sols will rock out my friend. I still miss the way the Sols uncover the weight in the music. It is additive LOL. IMHO the Sols display a deeper / wider soundstage and are warmer speakers. If this is important to you. The Europas are a tad more transparent with a sort of cool/neutral sound to them. Both have their pros and cons like any other speaker. I suppose it will depend on what your room can handle and what you can live with.
Good Luck!
Please don't let the two 5 1/2 inch drivers fool you! Those Sols will rock out my friend. I still miss the way the Sols uncover the weight in the music. It is additive LOL. IMHO the Sols display a deeper / wider soundstage and are warmer speakers. If this is important to you. The Europas are a tad more transparent with a sort of cool/neutral sound to them. Both have their pros and cons like any other speaker. I suppose it will depend on what your room can handle and what you can live with.
Good Luck!