any rotary cutters recommendations? Sewing Machines Parts and Sales in Los Angeles

im looking to pick up a rotary cutter and a cutting mat, and i was thinking of just getting the fiskar 45mm cutter and a 24″x36″ cuttting mat from walmart if they have one that big. anyone currently use it? i plan on mainly sewing and cutting thicket material, i currently have 5 yards of 500d cordura and it is such a pain to cut with scissors, they want to stay with the weave of the fabric and it gets pretty hard to follow the lines. my sister has a smaller 24″x24″ cutting mat and rotary cutter but im not sure what brand it is, and it look less than a minute to cut what i needed so im totally going to get one as soon as i can. anyone on if i should hold out/ go ahead and get it?