Haha, it's okay.
I just wanted to make sure. Sometimes I answer with what I feel like is the response to an "obvious" question and it ends up being something entirely different (some people just don't know how to talk I guess, or I'm slow).
Anyways, cabling questions are always so unique to the situation as to whether or not upgrading makes a difference. Are your current RCAs running a standard gold plated termination?
Considering the solid connection you have from the DAC to the component, I can understand why you might want to upgrade the RCAs - considering they are likely the weakest point in your chain.
I will tell you this much, my background comes working with larger scale audio (cars, home, etc) and cabling is everything. Some people don't believe in cable upgrades, but I think up to a certain point they make heaps of difference... on a macro scale.
I'm sure you'll observe a subtle difference with higher quality RCAs (if the ones you are using lack basics like gold plated termination), but I can't promise it will be drastic. If anything it will just improve the sensitivity of the setup a little.
Nice cables never hurt, and just don't brake if you use a little thought. I'd say if you don't have gold plated RCAs, jump to some - it is a minor investment and won't hurt.