Thanks for all the great advice.
A few replies. First of all, while I believe you're right and an upgrade is not absolutely necessary, what I read over and over again about is not skimping on power. The Enermax has served me very well, but I don't feel that a new PSU would be a mistake. And if i decide to upgrade mobos at some point, I'll be set there as well for the increased power demands. *shrugs* And frankly, with a card that asks for 480 watts, I feel better running at least that. Though I do agree the power recommendations are overstated.
Based on the feedback on this and other forums as well as shopping around and pricing, I decided to go with Antec. If I'm not happy for some reason, back to Enermax for me.
Basically, it came down to Antec offering a 480 Watt TrueBlue unit at a good price with a neat feature (blue LED's to go with my silver case and other blue lights - lol). Their price was competitive, the unit is reviewed very well overall, and I think all around it sounds like a good bet. Any more power would be wasted, but it should allow for upgrading in the future at the same time.
Now, I will say I did read about a (very) few of these Antecs blowing up, but given they also had a LOT more reviews at the site, I think that's probably just a case of "not as many reported from competitors". Also, the most recent incident of that was at least a year ago, and I read something to lead me to believe the design was changed (could be wrong though).
Anyways, close call, and I can see there are a lot of fans on both sides of things. I think both companies are probably great and and am looking forward to seeing how the Antec performs. If I'm not happy, back it goes and I'll go with Enermax.