It’s easily the $3m group. For $5m you get probably the best two players of the lot in Cesc and Ozil, but also two complete wild cards with an always injured Partey, and very inconsistent Ozil. With MØ/Rice/Cazorla you get three players who consistently work hard in every phase of the game and are still exceptionally good on the ball.
I’ll take consistent performance for $3m over a complete gamble for $5m easy.
But Viera is most definitely a “lightweight” player and he plays there.