Yers , I use 2 W4S SP 1, one with a high current module for my router and standard module in the same SP 1 powering my FMC, the second SP 1 is powering the FMC near my Melco N1ZH 60 server . I Also have replaced the AC wire feeding the SP 1 with Furutech SP 55N with Furutech 50 NCF male & female plugs. Only did this because I had them layering around collecting music dust.
These are the only LPS I have tried so I cannot comment on the HD Plex LPS,s.
The above SP 1,s and AC cords really cleaned up there noise with a very nice jump in SQ.