that will depend on how much you wanna spend on diapers? coz better brands wil lbe more ex.
if you intend to change very often, like every 3hours, you might consider using drypers. cheap, but for short hours.
if you wanna use for longer hours, like 5hours then change once, you might wanna use mamypoko or huggies ULTRA. so far i find this 2 better absorbent. actually pampers also good absorbent but i find it cant absorb the "urine smell" so quite stinky and can smell the urine smell very strong without opening the diaper.
maybe you can ask for samples from those diaper co and try out ? huggies and drypers does give out samples. also check baby fairs out, usually will have some promo. so can stock up. I stocked up huggies ULTRA during the taka fair this year. bought 24packs of diapers. ha! super cheap. usual was about $17, the fair selling $10.90 only. so grabbed alot. haha!