Thank you very much for all of your comments suggestions.
@darcman- The DAC suggestion is indeed interesting and I have that in my upgrade path as well. I could upgrade either source or amplifier at a time given the budget constraint and I decided on amplifier based on my personal choice. Ideally I should audition each upgrade separately and then decide but that would involve spending a lot of time which I might not be able to spend right now. However in the end I need both a quality source and an amplifier...
I am also interested to find out from the group whether 60W Class A power (mono-blocks) would have enough juice to drive my Aerials 7T, which drop down to 3 Ohms, in my 16' X 12' room. If not how much Class A power (min) I should look for to make this transition smooth? Any feedback on this would be highly appreciated.