Focal 1037be's Amp Suggestions ???

I have Focal 1037be's and I'm pushing them with a BAT VK300x Integrated. My listening room is 24x26 with 10' ceilings. I believe I'm under powered with the Integrated. I'm looking for suggestions as to what amplification works for others with the 1037's. I would consider seperates as well. I guess budget $$$ would be 5-6k plus what I can get for the VK300x. Thank you in advance for your input.