I use a Lyra Delos with a Simaudio LP5.3 with external power supply, basically what you are using, and it is an exceptional combination. that being said, I have come to the conclusion that small incremental changes to your system is more financially taxing than biting the bullet and getting the best you can afford in the beginning. this is after you have a basic system which you are happy with and are enjoying the hobby. You certainly have that system now, so I would enjoy, and as I can afford it, buy one piece at a time until you reach nirvana. It will be cheaper in the long run.