You have some pretty nice pieces. And there is no way that you can get a traditional source of suitable quality for anywhere near $500.
I think that you will do well with a stock SB - just upgrade the power supply and be sure to use a pair of ICs that is as good as the rest of your system - after all its a source... What you will have to do to get great sound (mod or stock) is do a good job of ripping - no hope for MP3s...
As Matt points out, you can always send the SB away later. Or you can add a DAC or the mod and a DAC.
BTW I agree with your overall approach and went much the same route myself - no regrets. In fact, with the modded SB units I go analog out to the preamp. From a dollar point of view this means that I have also skipped the DAC, the extra pair of ICs and the extra premium source power cable, plus the tweaks for the DAC. When you start to add all that up, it makes the mods look like a total bargain.
I think that you will do well with a stock SB - just upgrade the power supply and be sure to use a pair of ICs that is as good as the rest of your system - after all its a source... What you will have to do to get great sound (mod or stock) is do a good job of ripping - no hope for MP3s...
As Matt points out, you can always send the SB away later. Or you can add a DAC or the mod and a DAC.
BTW I agree with your overall approach and went much the same route myself - no regrets. In fact, with the modded SB units I go analog out to the preamp. From a dollar point of view this means that I have also skipped the DAC, the extra pair of ICs and the extra premium source power cable, plus the tweaks for the DAC. When you start to add all that up, it makes the mods look like a total bargain.