Is Pre-Amp needed

Re the accuracy debate: interesting comment in Stereophile from one of the writers. He quoted JGH as having said something along the lines of...Accuracy is something all audiophiles say they want, but when they get it they don't like it.

So...maybe using a preamp is less accurate, but it sure sounds better to me.

I will never use a preamp again. 

Based on my limited experience, preamp is most important part after your speakers. You can read all the numbers and statements that logically sounds correct but if you add a good preamplifier, you understand why people use preamps.
p.s)Some DACs equipped with a in built preamp but still I prefer a separate preamp specifically a tube preamp!

Never ever say never. It may be that you’ve not yet heard the right preamp for your system. By right I mean it makes the system sound better to your ears and by better I mean it adds the spice you didn’t know you’re missing.