Given your stated budget and your requirement for DSD, the Audio Mirror would be a fine place to start in the tubed dac world. Even though I am not personally a fan of Chord or the Chord Qutest, many people are and it does DSD.
As an aside, I prefer everything that's been mentioned above to your existing dac. No intention whatsoever to offend anyone but the Wadia you have was a long way qualitatively from the old Wadia or the sound being achieved these days by many manufacturers. You should experience considerable improvements from this upgrade. It is unlikely though that you will get the quantity of inputs you mention above. Most dacs dont offer 2 toslinks, et al. Thats the specialty of A/V amps.
As an aside, I prefer everything that's been mentioned above to your existing dac. No intention whatsoever to offend anyone but the Wadia you have was a long way qualitatively from the old Wadia or the sound being achieved these days by many manufacturers. You should experience considerable improvements from this upgrade. It is unlikely though that you will get the quantity of inputs you mention above. Most dacs dont offer 2 toslinks, et al. Thats the specialty of A/V amps.