Florian,
Do you plan on using the Scintillas as mains and the RM30s as surrounds ?
Good as the RM30s are, I'd be surprised if they can approach the performance of the Scintillas, given they are properly functioning and properly driven. The latter can be a major undertaking although the availability of powerful class D amps is helping.
I don't mean to imply anything negative about the RM30s. Along with the VMPS siblings they are superb particularly at their price points. But the Scintilla is a true classic and capable of performance matching anything made today at any price point.