lagotripha, dsagent, pillarofcats: For people who want to buy this deck, I was thinking that Thalia may be too expensive for what it contributes. What other more budget hatebears do you think would work well? Leonin Arbiter?

I'd reccomending mainboarding sideboard tools if you're looking for budget hatebears dependant on your metagame- List of Modern Sideboard Staples is a pretty good assessment, as well as looking at G/W hatebears or hexproof lists ranking in tournaments.

lagotripha I know the options; I was looking for opinions on which to put into my deck.

Its difficult to make budget reccomendations in a general sense, because its difficult to know how likely your meta is to show their weaknesses. If you're seeing a lot of fetches and toolbox strategies, arbiter is the correct choice, but there are a huge array of possibilities which while situational, might be more appropriate.

Grand Abolisher does a lot as a single step down to help resolve worship. Most of the creatures for consideration are already in hatebears lists. Personally, I'd much prefer to try and resolve a Pithing Needle or Phyrexian Revoker for the number of sacrifice effects tied to plainswalkers and general combo peices in my meta, and when operating on a budget colourless cards that can be swapped between decks on a sideboard really do help . I'd consider a single Spirit of the Labyrinth- it is very vulnerable to removal, but has a lot of utility blocking combo until they can fetch an answer. Cards like Storage Matrix/Witchbane Orb are similarly disruptive if looking for budget options, but cmc is super important when looking for tools. The manadorks will help, but it is a consideration. Dawn Charm has utility. Heliod's Pilgrim can search out pariah for combo-wombo, but otherwise isn't very useful. Bower Passage has blowout potential against decks reliant on lingering souls to stabilize, or Gravity Well to handle a lack of flying coverage. Some people swear by Skinshifter. Scryb Ranger is a dumb trick that can win games.

There are a lot of cards out there- there is going to be something to fit exactly what you need. Thalia is popular because she is such a great generalist. If you're casting spells, nope, wait another turn. But for budget, look at what you regularly face and find something that people sideboard to do that delay, even if it the lowly fog effect of Dawn Charm.