What type of attachments? Simple buckets - grapples - 4 in1 type attachments ?
Cat's a great outfit but some attachments are not worth a penny more just for the Cat sticker on it. I had a CAL (Construction attachments Ltd) 4 in1 that was very well built, but still, basically only a bucket.
Now expensive mulchers, milling heads and other big ticket items (with a motor involved) a big name manufacturer/dealership would become more important to have parts support like Cat's, but certainly not limited to them. This is not to say Cat can't be competitive on pricing either, it's just up to your dealer like any other dealer but your local NH or Case dealers may both offer the CAL line, while Cat, JD & BC (possibly) sells the same, just rebranded.