Looking for korean music with classic asian instruments but that are modern sounding. For example I loved a lot of music from Rebel: The thief who sto6le the people. Especially Ahn Ye Eun's version of If Spring Comes. Also really liked the male version.

Also a really big fan of Suonas, however, every time i try googling for music I only find these boring orchestra or similar. Love the suona in one of the OSTs for Legend of Chusen. But finding similar seems impossible for me.

Thanks :D
I dunno, shangri la by vixx or dream in a dream by ten?
Try out the OST collection of Ruler: Master of the Mask? The kdrama itself was lacking in many areas, but the OST was pretty good IMO. 

Ahn Ye Eun's OSTs were lovely!

I love songs in historicals and ones that mix classical instruments. I can't think of many right now but these came to mind: 

Topp Dogg - Arario

Hong Jin Young - Cheer Up

try Henry. He uses classic instruments in his songs/videos.