John:

I'm likely the wrong person to ask about upgrading because "Santa" brings me an upgrade every year! All of the upgrades are very good value in my opinion. If you can find it in your pocketbook to acquire all the current styles, then I would go for it.

If that's not in the budget, then you might consider just upgrading the program itself, and then save up for a future upgrade.

Not sure what you mean by "back-up tracks". If the styles and RealTracks you listed are the only ones you have, you'll likely find yourself wanting more.

If you don't have my suggested styles, let me know and I'll see if I can come up with something else. Let us know what other styles sets you might have, if any.

Good luck!
Lloyd S