Although the Rowland Capri is a fine preamp... I have found that systems with tube pre and solid state amps with be more musical and warm. Tube buffers will only be a band aid and may even make the sound worse. Matching tube gear to solid state can be a touchy job. I am sure you spent much time in evaluating gear before you made the purchases, thats the down side! If I was you I would take a second look and my needs,then think seriously think about some changes that make sense. Thats the up side.
Good Luck
Good Luck
Good Luck
Good Luck