I agree w Shakey but for slightly different reasons. The Wilsons, or any other highly resolving speaker is gonna reveal the limitations of your upstream components. You didn't mention your source, but the Arcam, although v. good for an HTR, is not gonna deliver the goods. The Wilsons will let you hear their limitations quite clearly. I'd recommend putting the $20K into a high quality integrated w HT bypass, a top notch source, and a good pair of fronts. There are lots of possibilities. I'm a tube guy and could heartily recommend a VAC integrated and a pair of Merlin VSMs. For $20k you buy them new. If you went used, you get Merlin TSMs for the rears and a new (v. hard to find used) Merlin center. For Solid state, maybe a Pass integrated (not sure which speakers would mate best, but there are tons of options in the price bracket you are talking about).