I like the Big Rogue, fwiw. Vandersteen has paired them with the 5's at a show or two I believe so if you go with their speaker you may find they have some insights on synergy.
My guess is that you will sooner or later have to swap the Cardas golden cross to get the slam & speed you want. I like that ic but I think you'll find you want something less forgiving when you get your new system complete.
Am a bit cautios about the VK150 reccomendation. I think they have a sound that you will either love or not & will not have the headroom power wise (relative to the Big Rogue and the VTL 450)that you might want for some speakers. They might be just the ticket for your system and tastes but I'd insist on an in home trial.
My guess is that you will sooner or later have to swap the Cardas golden cross to get the slam & speed you want. I like that ic but I think you'll find you want something less forgiving when you get your new system complete.
Am a bit cautios about the VK150 reccomendation. I think they have a sound that you will either love or not & will not have the headroom power wise (relative to the Big Rogue and the VTL 450)that you might want for some speakers. They might be just the ticket for your system and tastes but I'd insist on an in home trial.