I wouldn't, as I prefer the JDS labs CmoyBB v3 over the iBasso T3 and T4 (owned both and sold them) for SQ, though the T3/T4 is a nice size for portability. Don't know about the D2 but for a similar priced amp with a better form factor (and one I also owned), I would choose the Leckerton UHA-4, which also has a DAC.
Comparing a DAC/amp with the CmoyBB is not really apples to apples because you get a DAC with the D2.