I was considering taking the plunge and buying a 42" plasma television. I am a little confused about EDTVs vs. HDTVs. I know that EDTVs don't have the native resolution that HDTVs have. I guess I'm wondering how important that is for watching standard cable TV and DVDs. I can't see paying so much extra each month for digital cable when so little programming is in HD. I also don't want to spend thousands on a plasma set that will be obsolete in 3 years. I've read about reliability issues with plasma. Would it be wise to wait for the larger LCDs (42") Can anyone give me some advice?