Yes, don't rush out and spend big yet. It could be that the Shorty Plus is not that bad, and I just got unlucky and got a dud (??). You bought the 6" rather than the 8" because you didn't want to spend too much on your first scope (and saved $100)! Now we're already talking about getting $300 worth of accessories to look at Saturn!
Welcome to astronomy!
You'll see plenty more with just what you have when seeing is good and scope's collimated. If you want a bit more, then a 15mm GS or Synta plossl + barlow for under $50 each would do you very nicely for quite some time. But collimating eyepiece should be the 1st priority.
I saw 2" eyepieces mentioned here. I don't think your scope has a 2" focuser, does it?