I had the same problem some months ago and everyone said you cant use delay and reverb at the same time and I knew that wasnt true - Kurt usesit , Kresiberg, Metheny, Frisell, etc... they all use it.
The first thing is to have the delay first and then the reverb, not the other way around. Set first the reverb and dont put too much, reverb is like sault in the food, you need it but not too much. I dont know about the Nova Reverb, I use the Hardwire RV 7, its great, but I never put the level above 10h (Hall setting).
Then set your delay. I guess the mistake most people do is to put the delay time really short - and then it becomes a reverb, thats why its muddy, you are basically running two reverbs. If you hear Kreisberg or Kurt they dont use the delay really short (but not really long also) - but you must put the level really low so it doesnt affect your lines. I guess delay around 300ms / 400 ms, a lot of feedback (but not too much) and the level really low is the trick.
Dont go for the Ehx, I never tried your pedals but the TC things are great (I use the Nova Repeater with the RV7), I am sure buying another pedal wont solve your problem - Kurt used the Nova Reverb and the Nova Delay in the past and Kreisber used a DD-3 and a Nanoverb which are not the best pedals in the world and he gets brilliant sounds with it.
Oh and I am sure someone will tell you to buy a Lehle mixer, it helps to clean your sound (I use one) but it has nothing to do with your problem, I can run my delay and my reverb together without the Lehle just fine.