My 2 cents:
- I have owned the IC-200D (mk 1 & 2) in the past, thought they were OK, not great. For budget cables, I liked several better (DH Lab's Silver Sonic, Van den Hul D-102 Mk 3 Hybrid, Luminous Audio Monarch Sig's, ZCable Jazz4, Zu cable, and more).
- There are some AMAZING cables out there for cheap $$. IMO, you don't need to spend a lot to get great sound. For many, the extra $$ will get better sound, but the margin of return on the investment goes down more quickly these days (IE, you get 80% or so within the first $150-$200 prhaps)
- If you can borrow some cables to try, do so. Don't spend variably just to try things out (it CAN be fun, but also expensive)
- Otherwise, if you're happy, why change ? Enjoy your bliss !
Good luck, and good listening.