Please help to chose Integrated amp Diablo 300 , darTZeel CTH-8550 Or ....

I have vitus sia 025 partnered with chord dave. Compared vitus
with diablo 300 before buying, very close fight, could have
gone either way but decided on vitus for its more intimate
midrange and it makes lousy recording more listenable.

Try using your chord dave as a preamp. You’ll be surprise 
how good it is.

I am using my chord dave on two sources, an aurender and my
onkyo and plinius cd player. I use my vitus preamp on my
aurender and dave preamp on my cd player. I think you
have to give it time to settle in or break in its preamp mode
since it took mine quite a long time to settle in.. i like it for
its more forward presentation with thicker density on vocals.