Yes, HDMI is standard on both versions, which means the only differences between the two are...
60GB version has these in addition to everything the 20GB version has:
CompactFlash®, SD Memory Card and Memory Stick Duo™ card slots
Wireless network connectivity (Wi-Fi)
Pre-installed removable 60GB hard disk drive (HDD)
That's it. So snag a cheaper one if you can and upgrade the HDD later.
See for yourself.