User blog:Mr. Pie/Should I go for attachments, Veteran, or move on?

Sup COD Wiki, just got my 1000th MP5K kill and was wondering if I ought to go for the Mastery challenge by getting all the attachments, the Veteran challenge by getting about 600 more kills, or just move on to the UMP (or Kriss, P90, or Mini-Uzi, I know all the SMGs get a lot of hate).