@david_ten It's easy to recommend better speakers. As long as you love looking into a dirty, unkempt room (in this specific case with everything else held static).
Take your Wharfedale speakers to any well executed system that is amp appropriate for the Wharfedales and you will be floored. Bring a top end speaker, regardless of spend (again amp appropriate) into your system...the results will speak for themselves.
In my opinion David’s earlier recommendation to address the quality of the AC power is both fundamentally wise and will establish a foundation for the entire audio system.
1 Dedicated 20 amp AC line exclusively for audio use.
2 Good quality AC wall outlets.
3 Good quality AC isolation transformer/conditioner.
4 Quality well implemented cables to enhance/improve electrical and signal transmission.
A number of these essential items can be purchased used to further limit cost.
This will set in place a very crucial aspect of developing a splendid audio system. This can be successfully accomplished for well under 10K dollars. With this ground work done, one can expect to get the best performance from any subsequent component changes and upgrades. Address the fundamentals first.
Charles