I have never used the pads you're thinking of getting, so I can't comment on them, sorry.
I'll share some thoughts on some of the brands that I use.
I really like Poly Pads. I have 4 of the Poly Pads Classic style, they are more expensive than what you're looking to pay, but they are very durable, I've had mine for ages! They don't have girth and billet straps, so they can be reversed/used on both sides. They stay in place very well, even though they don't have straps. They also have a nice level of thickness to protect the horse's back. I usually use a Mattes sheepskin 1/2 pad on top of regular style pads, but I don't have to with the poly pads.
I also have a few of the Lettia cotton quilted pads, they also hold up well, but still a little more than what you want to pay.
The Roma brand of saddle pads are also very nice and they are under $40. These are just as nice as the Lettia pads, but much cheaper!
In Canada, we have a huge mail order/tack shops across Canada store called Greenhawk that has their own brand of saddle pads called Shedrow, I also really like these cotton quilted pads and they aren't too pricey.
I also have an Eskadron pad that cost a lot for what it really is and it is my least favourite pad!
Anyway, just thought I'd share, sorry it doesn't help at all with the pads you mentioned!