I think I've come to some conclusions.
1) I can't afford anything right now anyway and a couple of responses about saving for a real upgrade makes a lot of sense.
2) *IF* I had a limited $300 budget right now, I think that the speakers I'm looking at (Onkyo SKS-HT540) would be an upgrade for 2 reasons. a) I would be upgrading from 5.1 to 7.1 and b) the subwoofer alone would be much more robust.
That being said, if I got my hands on $300 would I spend it on these? Probably not. I would likely take the advice to save for an even bigger upgrade.
By reading everyone's responses though, I was able to figure out (I think correctly) that this would be an upgrade - but maybe not worth the money and effort.
I've said it before but it bears repeating - "thank you". What a wonderful community. When the time comes to buy, I know I can turn to you guys for help.
A couple of other notes. I think that asking you guys about this is like asking a Ferarri owner about a Corolla

You guys know and probably own high-end components and I'm asking about a low-end vs low-end components. These speakers get 5/5 from average users everywhere, but I know that this community isn't "average" - I mean this in a good way. And what one poster said about the wife has merit. For those of us who are married the "wife factor" comes into play no matter if we're talking about the money, aestestics, priorities, etc... so thank you for throwing that into this thread as well, that's real life for husbands to some degree.