Let the hive mind of Engadget get that for you.
"I've found myself using my PC for a lot of conversations lately, and I'm also considering recording a podcast to share with anyone who will listen. There are tons of USB headset / microphones out there, and I'm hoping someone has some solid recommendations based on experience. I'll consider both headsets and standalone mics, by the way, but I'd like to keep the bill under $100 if possible. Help!"
I was all for HD on freeview originally, but now Ofcom are selling the spare spectrum created by the switch off, all it's ever going to be is a limited service with only 10 mbps available to each of the 3 HD channels - BBCHD on freesat currently uses 16 mbps! and Sky sports 19 mbps.
Plus to create this limited service they are going to rob bandwidth from existing channels, thus reducing the existing picture quality of SD freeview channels.
Surely freesat is the best way to go, with massive bandwith for SD and HD channels, plus proven S2 technology and cheap and available receivers.