Talk me out of spending a lot of $ on HDTV

[CrazyEyez]

I'm thinking about joining the HD world.
- DLP or RPLCD + stand = ~ $2.5k
- directv HD package = $11/month
- additional sat box when I move my existing tv to living room that currently has no tv = $5/month
- Upgrade directivo box to HDtivo box = rape ($???)
- off-air antennae for network HD content = $???
- directv installation of antennae/new triple LNB dish/new line to living room for old tv = ??? (probably more rape)
- Opportunity cost of wasting more time in front of the tv instead of, um, online endeavors = $???
- dvd player because mine is old and is not progressive scan = ~$100

But it's fine because:
- wife only works part time
- we plan to have a second kid soon
- we will need a bigger car (~$30k) next year (see above)
- I don't make much in my "online endeavors" because I don't spend much time at it (see wife and soon-to-be 2 kids)
- I make mediocre money at my day job

But what are the CONS to making the upgrade?

In all seriousness, is it worth it? I've had a 27" WEGA for years. When I bought a 5.1 sound system years ago I thought it was the best thing ever. When I walk through Best Buy on a Sunday and football is on in HD, I drool. It's worth every penny, right?