Buy a used Arcam rDac available on Olx or you may consider ifi iOne new, however it's just sold out on Headphonezone. IDSD LE is available at 10k on Headphonezon. You may also get lot of deals here on various used DACs.
I have used a Musical Fidelity V DAC II with the Swans Mk II model, the result was impressive. Going by word of mouth the MK IIIs are a worthy upgrade on the previous model, if you can import then a Musical Fidelity will be a great asset.