I'm thinking either DacMagic+ (Dacmagic 100 for cheaper?) or Musical Fidelity M1 DAC A because the previous gens measured very well.
And both have plenty of features.
Take this with grain of salt, but if you look on the DACMagic Plus thread there seems to be a lot of controversy over the sound of the DacMagic Plus.
Maybe that just means it's too popular!