Best used class A amp with Wadia 860x

Just purchased my first High end CD Player, a used (4 month old) Wadia 860x and now i need recommendations for an amp that will do it justice. I'm not sure if i should be looking for a Class "A" amp or other ?? My speakers are B&W N803's and I'm looking to connect the Wadia direct to the amp. I've been thinking that I should be looking for a used Mark Levinson, Plinius, Jeff Rowland or Pass Labs X Series. Any suggestions including model #'s would be very helpful. Thank's in advance, Jerry