I would recommend PSE -- it does come with some embellies and frames, but a lot of them (at least in PSE9) are "locked" and must be purchased. PSE has and can use styles, shapes, brushes and most actions, which add a considerable amount of flexibility to your scrapbooking repertoire.
If you want high-quality looking pages, you will have to invest a little money in high-quality products. Remember that digital scrapbooking (with PS/E, at least) allows you to recolor and mask, erase and blend - among many other things - and you can re-use all of your purchases as many times as you want, so your dollars are money well-spent. If you want more flexibility, check out any of our ScrapSimple products: (The ScrapSimple Club is a GREAT deal at only $6.99/month.)
They are grayscale images, so you can easily recolor and blend them to match any color scheme of your choosing. Some come in layers, so they are further customizable by turning layers on or off to create many variations. Scrap Girls has a lot of freebies and specials for you to download and use (they change all the time, so you will be able to collect quite a few.)
Once you get into the creativity involved in creating your own pages, I think that a scrapbooking-only program (Craft Artist, My Memory Suite, etc.) will be too restricting for you. My advice is to go ahead and invest in PSE. Check out tutorials and ask questions in the PSE forum and you will be amazed at what artistic pages you will be making!
Can't wait to see your creations in the Gallery!