@arvincastro, Alpha-Core offers (ed?) a free trial, with only shipping costs to be incurred. There is no sound reason not to use the RC networks (zobels) and they are only used to keep some amplifiers from going into oscillation. I strongly suggest using the RC networks! The original flat MI (copper) and AG ( silver) seem to be the preferred sounding versions. The later twisted runs are reputed to be more durable. The silver spades also seem to be the preferred terminations. Alpha-Core used to recommend the series #’s 1, 2 , 3 based upon amplifier output. I seem to remember recommendations of up to 150 Watts for the 1’s, up to 250 Watts for the 2’s and the 3’s for 250 Watts and up. The MI’s due to materials used are much less expensive than the AG’s. Whether or not one prefers MI’s (copper) or AG’s (silver) will come down to personal taste and budget, The specs are quite similar. FYI, all of the above refers to the speaker cables only.