Subs for coners or built-in sub inside speakers

I've always had difficulty blending a corner sub(s) into my systems.This is especially true for listening to music(as opposed to movies).I use Canton Karat M 70's with their sidefiring unpowered woofers in my main theater system(no sub).Despite many equipment changes,I've been happy with the speakers for 10 years! I do regret selling the Mirage OM-6 speakers that used to anchor my 2nd HT system in the basement.I've moved to smaller monitor with a corner sub.I can never get the bass quite rightThe OM-6's were so coherent with their built in ,very adjustable powered subs.

I'm leaning more twoard the Definitive Tech approach as I sated that I don't have much room in my Listening room, and I'm thinking by going this approach this will be somewhat cost effective and will be able to spend more money in other area like seperate!