Ah that . mighty find budget for just a transport! Lumin should definitely be on your list to trial. It has a BNC Coaxial digital out.Thanks for the info @The Chronicals. I really like the RME DAC, so will be just streamers for now. Looking to spend around 2.5k max. I mainly use coax output but this will depend on what streamer I go for. Some only provide the option of USB output into DAC of choice. Ifi products look very promising and shall look into them if and when needed.
Trial the IFI's definitely, you may be surprised at what was 'there' that you didn't know about. I needed to get rid of a digital harshness and no matter what component I tried it was still there, all it took was the Isilencer and Ipurifier.
Look forward to hearing your streamer shootout