Is Kalonian Tusker really better than just two more Pelt Collectors in this deck? It's nearly guaranteed to be the larger creature by the time you start attacking and it gives itself Trample over time. The lower CMC is just icing on the cake. It also supports Avatar of the Resolute better. Sure, they're nearly $3/ea, but that still keeps you with a $20 window before you hit your $100 budget.

Narnam Renegade ? It may be ideal if you can force a fetch or two into the deck, despite budget constraints. Still, it will land as a 2/3 deathtouch most of the time on account of the fetches other decks play/heavy removal suite.