I'm sure Accuphase would be flattered to know that you are considering one of their preamps for its warm, thick and slow sound (LOL). As bdp24 said, you can find that sound with many other products, and at a lower price.
Which pre should I choose?
There are two Pre in our 2nd hand market. One is Accuphase C-290 (selling at: US$3300) which start to produce in 1993. The other is Accuphase C-275V (selling at: US$2600) which start to produce in 2000. My power is Accuphase CA-47 to drive Dynaudio Countour 1.3SE. I like warm & thick & not to fast sound. Do you have good ideas? I prefer to listen to classical music mostly.