stay with tubes!
ARC Ref 300 or 220 can be had under $10k used. if you want to start lower, VT-200 can be had under $3k. my personal favorite is BAT VK-150SE. even though they only have 150 wpc, they should drive your VR-4 louder than you care to listen to.
ARC Ref 300 or 220 can be had under $10k used. if you want to start lower, VT-200 can be had under $3k. my personal favorite is BAT VK-150SE. even though they only have 150 wpc, they should drive your VR-4 louder than you care to listen to.