Power choice

I need a integrated amplifier and or amp and pre-amp combo. Currently have a pair of refurbished Infinity Quantum 4  speakers that are 6ohms and most likely dip to 4ohms. Budget range is 800.00 - 1000.00, for used equipment. It's for a medium sized room. Listen to mostly prog-rock (Think Porcupine tree) and guitar driven jazz (Think Larry Carlton). Below is a list of gear I have researched.

Plinius 8100 int.
Hegel h70 int.
Parasound a23 amp. pre amp not sure.
Schitt Vidar amp Freya pre-amp.