Rotel gear seems to be a popular choice for B&W speakers of this calibre. I have a set of four 602s for my HT set up and have used them with Rotel power amp RB1090 (front channels) and Yamaha DSP-A1 surround amp with pleasing results. The Halo that you own is also highly regarded for its cost. I suggest you hook your speakers to this amp and if it sounds good then you may want to consider the Halo matching preamp.
B&W speakers normally sound better biwired. The difference is slight but noticable particularly in transparecy. I found this both with the 602s and 804s.
I don't have much experience with the wide range of cable choices available, however I'd try Kimber 8TC or 4TC. My 804s worked well with Kimber's BiFocal XL speaker cables.
B&W speakers normally sound better biwired. The difference is slight but noticable particularly in transparecy. I found this both with the 602s and 804s.
I don't have much experience with the wide range of cable choices available, however I'd try Kimber 8TC or 4TC. My 804s worked well with Kimber's BiFocal XL speaker cables.