You really should upgrade. Even if you only pick up a 24" or a 32" for a couple of hundered it is going to be 1000X better then SD. SD is a dead format so you are not going to see any improvement and in fact don't be surprised if SD channels start to be drop in the near future because they are a waste of bandwidth and money.
So, we just upgraded to an LG 51" Plasma...
I was really skeptical about how much better it would be, but I am a believer in HD now. TV w/ tax was $800 on sale. The upgrade for HD service is $12 more than what I was paying w/ WOW. Even the games on Versus/NBC Sports is amazing! Totally worth the cash.
Mostly they just look kinda stoned (Sara, the dark-haired one) or stare directly into your soul (Hallie, the taller, blonde one). It's like they couldn't even find anyone with previous experience in front of a camera.
And I also wonder what the point of them are? If they're here to attract a male audience... why? It's a sports channel; you already have a predominantly male audience.