ChestHole has a consistent, no nonsense look, but everything looks a little chibi.
MShock is prettier and sleeker, but some of the zombie models are off balance, and look a little silly.
If you’re up for the task, you can edit any of your tilesets. They are in the “GFX” folder and can be edited with Paint. You can edit existing tiles easily, but if you want to add new tiles to items without an assigned tile you have to do some light coding.