I started with a used L-3000 and had no urge to change until a deal came up to sell/trade a Denafrips Terminator and cash for a L-7000. Wow, didn't know what I was missing, just better in every way and both were holographic.
Reading the reviews comparing the L-7000 with the L-8000DHT left me wanting and I recently sold the L-7000 and purchased a L-8000DHT new. Same thing but more and hard to describe. There is something special going on with Allnic you need to hear to appreciate.
When I sold the L-7000 there were a few for sale at the same time, mine had the constant impedance attenuator. I had several low ball offers and then a flurry of solid offers, it sold in about a month.