Tube amp for ProAc Tablette Anniversary

I bought a ProAc Tablette Anniversary paired with Rega Brio R. I've read ProAcs are voiced with tube gears so I borrowed a vintage bell integrated tube amp and what a difference. I love the sound better than using SS amplification now I'm looking for a tube amp that would be sufficient to power my speakers. the Price range would be under $5,000 what i'm looking at are Leben CS300 or 600 for now. Any other brands you guys tried with ProAcs?