I bought terri toweling training pants from big w they were in pack of 3 also. cant remember the cost. I find that they are very absorbant when you have accidents which is good.
I wouldnt spend a fortune on anything..... they are quick and easy to dry and you want them to feel wet wjen they have accidents also so nothing to aborsbant.

I did buy the disposable aldi training pants also for when we go out. We just got back from QLD on holiday, we started TT a week before we left. They were great as he still recognises them as undies and you can pull them on and off as much as you like. They were fantastic on the flight home when he didnt want to use the airplane toilet, not that I blame him. LOL