"The Bricasti M1 sounds much better direct than the DSD."
That's your reference, so whatever you do, you'll need to compare it so you don't make a backwards move. A preamp is a very personal choice. So whatever is recommended, by me or anyone else, needs to be followed up with a demo. I really can't stress that enough. A preamp is the one component you really can't afford to mess up. Also consider that you have good sound now, going direct with your dac. When you already have good sound, its much easier to make a mistake than an improvement.
I'll start off with 2 recommendations. For solid state, I would look at an Ayre K-5, and for tubes, an Aesthetix Calypso. Those 2 pieces do everything right, and work well with a wide variety of components. Either should go very well with your Rowland.
