Nobody can read your thoughts and understand the motivation behind your consideration for the C15. If it’s bang for the buck (or, more correctly, sound for the buck) there may be better choices. If you are okay with part of your equipment investment satisfying intangibles such as: been on your bucket list for decades, love the esthetics, something that represents a top tier product sitting in your home, etc. then only you can assign value to this equation.
My first introduction to "real" hifi was powered by McIntosh back in the early 70’s. It took over 40 years for me to finally own the product that first introduced me to high fidelity sound -- and launched a career in high performance audio. Our motorhome depreciated more the first year we owned it than what I paid for my "Mac stack." Using other examples of what we can invest in other "indulgences", the Mac amp & preamp have proven to be a bargain.