Will I notice a difference?

I currently have an Exemplar/Denon 3910 CD player ( a Denon unit modified at great cost by John Tucker) and a Cambridge Audio CXN streamer. I'm thinking of getting an Mhdt Orchid dac but will I hear a difference or rather improvement ? I've tried sub $1000 dacs like Topping D50 and heard no difference at all. Guess I'm tending to be cynical about external dacs but would appreciate some informed opinions.