Just as an FYI.
I have a DS212+ and it runs Sickbeard, couchpotato and sabnzb just fine. (admittedly sabnzb doesn't download as fast on the nas as if I run it from my pc, but it still manages 3.5MB/s, so only takes 5mins to download a HD tvshow). So you may want to reconsider splashing cash on new kit to run the hacked version if a suitable DS would suffice.