On Newegg the New Monitor 15c center channel is selling for 109 with free shipping. I have a pair of RTi4's. I've read that the CSi3 is the one that compliments the RTi4's, but I'm curious if I'm able to pair the 15c with my RTi4s. I can finance interest free if i get the 15c and the PSW505 as it will total over $250. Let me know your thoughts! Thanks!