Thinline saddle pads are amazing and are not that expensive. If not you could go with ecogold or ogilvy but they are a bit on the expensive side.
Kavallerie half pads are great! There are tons of reviews about them on YouTube!
thinline pads are great, high qualty pads, and somewhat inexpensive (compared to brands like ecogold & ogilvy)
Coolmax is definitely your cheapest option and those are really good too:)