I also have Sonic Frontiers preamp (SFL2). I use Mark Levinson 36s DAC and a 37 transport. The sound is great. I would highly recommend them. I am working on 2000 CDs. I dont think I will ever sell neither my CDs nor my Mark Levinson gear. I thought I would when SACDs first came out. But I soon realized I never would sell all of my CDs and buy in the new format. You can not find it all, it is a hassle and I dont want to spend the time on it. Some of the CDs have a special place in history for me due to autographs and gifts that can never be replaced. If there are new technologies bring them on. I never sold my record collection either. So I would not limit money for CD technology buy what sounds great with what you have now, enjoy the music.