It sounds like you have already decided...but in case you haven't I thought I would put my 2 cents in.
I have the purina 2nd nature one (I think, maybe not) Either way, I have one I bought at Petsmart over 2 years ago and they were selling the 2nd nature litter. I also have a smaller one that I got from Petco. Which Petco has multiple sizes and store brand litter.
After awhile I kind of got tired of using the litter more than Joli not liking it and the smell was never really "absorbed" like it should be. And I decided to look into other options. Because of the location I currently have her "potty spot" (under the bathroom sink, if it isn't in the bathroom she uses the bathmat because she wants to go where I go, and my bathroom is kind of small), I didn't want to use the fake grass things because I was afraid it would be hard to clean without making a mess.
ANYWAY, I found the Tidy Cat's Breeze litter system and have been a BIG fan. In the beginning I used the litter with it, but it was loud and Joli was kind of indifferent of it being there and this was about the time I got Somi and she was afraid of the sound. So I started using it with just the pads underneath. There is the little "compartment" for the pads and the poo stays on top. This way it is easy to throw away the poo and the pee smell stays contained so the smell doesn't overwhelm the whole room. This way I can leave the same pads in longer. Oh and also I have two next to each other with the sides cut off between them because I felt that one was too small for my 8lb Joli.
I was about to get washable pads for the Breeze system, but Somi REFUSES to use it because when I got her at 4 months she was already puppy pad trained. She does really good on puppy pads, but refuses to use the litter box thing or even "go potty" on command ever. But she'll get up and go to the puppy pad on her own.
And currently Joli has taken to liking to use Somi's puppy pads (as well if you see my other posts Joli will hopefully be finding a new home soon) I will probably not be using the breeze system anymore, just puppy pads in the old litter box.
But I really like it because it keeps the smell contained a lot better than just a pad. So I hope someone else can benefit from my discovery with a less picky pup!!!