I'm not familiar with your components except for the Node 2i. The sound of the Node can be improved with an aftermarket power supply kit. There are several choices available. I bought the LHY kit from Beatechnik which is in Singapore. I would recommend the bundle kit with the LHY outboard dc voltage supply (I got the 25 VA option). All of their pricing is in US dollars. There are You Tube videos about the kit done by one of the main guys at Beatechnik.
Some amount of manual dexterity is needed to do the install but, it is rather simple to do. You will no longer use the C7 (figure 8) power cord but instead, will need to use a conventional audio power cord with the standard C15 IEC cord end which will greatly expand the choices of power cord to use in this case. PM me if you are interested in what I found to work very well with the LHY/Node setup.