You might also consider the new ICEPowered BelCanto Design Ref 1000 Mono amps. for the Sr's. The VR4Sr's are a terrific speaker system on par with the 99's sonic qualities,,I'm living with both. The 99's are being driven by a SET40 with KR845 tubes. Simply stunning and seductive.
Terrific extension, detail and wallop when the 4Sr's are driven with hi powered SS gear or something with a palpable touch like a VAC Avatar Integrated tube amp. The VAC works nicely with the 99's as does does the Cayin A-88T Integrated.
As disclosure, I am a dealer for the above, and I've had loads of equipment pass thru before settling in with the amps I've mentioned. All offer terrific value.
BTW, also consider the Verbatum cables from Paul Garner.
Jack