Very good remix!
I'm quite a fan of this song from the Castlevania series, so it's wonderful to see a remix of it here. I think that the synths are fine, for my tastes at least, although at some parts, such as 2:08-2:18, the guitar accompaniment should be turned up a bit and the drums quieted a tad bit.
But overall, a wonderful song!
I'm wondering how'd a remix of Condemned Tower from Dawn of Sorrow would sound like if you made one. ^_~
Good job!
-HFX ^_^