help with Amp for system audio SAK2 monitors?

Hi there!
I purchased a pair of this monitors wonderful sounding and beautiful looking but i am facing a problem, i dont think that my Rega Brio R its enough power for them!

I have to put the volume almost to max to get the best out of them, and myself coming from amps with super clean power, I can sense i need to let the Brio R go, and start the hunt for another amp and no idea to where direction because i only have around 1K, graduate school as a full time student doesnt help!
Impedance: 4 Ohm (easy load)
Frequency response (+/- 1.5 dB): 40-30.000 Hz
Sensitivity (1W, 1m): 87 dB
Crossover frequency: 3000 Hz (24 dB/oct. Linkwitz/Riley)
Dimensions (WxHxD) cm: 19.5x34.5x30
Woofer: System Audio W2K
Tweeter: System Audio TK

Thanks