Welcome to the Silver Bullet family. You will be amazed at the detail you can get and how fast you can cut your projects. I cut a wide variety of card and text weight paper. I love Neenah Solar Crest (white) for card bases and get much of my card stock from Paper Temptress (online). I will get a lighter weight card stock (Georgia Pacific) at Target or Walmart for projects where I don't need a heavy weight.
Are you looking for a recommendation for a colored or white card stock or a certain weight card stock? As I recall, Recollections is a lighter weight card stock, right? There is no reason you can't use what you are used to, especially while you are learning and getting used to this new machine. If you need more info, just ask. Happy to share all of the different brands I use, just not sure exactly what you are interested in.
Have fun learning and getting to know your new best friend!