Which Amarra Should I get for AIFF Exclusively?

Hi there, I currently am using a IMAC for my music server with a HRT Streamer II for now. I do not plan on going into HI-RES as Id prefer to spend the money on Vinyl.

With this as my basis would I get any upgrades from Amarra Junior to Amarra Mini or even Full blown Amarra?

I have a full range system so I cant see any use in crossovers, But I am curious about the Equalizer and how much more you get with each upgrade.

Oh I tried Puremusic and I cant live with the gaps in between songs, Does Amarra have gaps?

Thanks a million Toby