Macca,
Can't comment on Myth TV vs MCE
MCE supports dual HDTV tuner cards (I use the Terratec which takes up a single PCIe slot). Can record while watching etc. as you would expect.
I am not aware of a 'trap' with dual tuner cards. They are just two separate tuners on one card. They record to the hard drive in DVR-MS format. Recorded programs are easy to play back from there. If you want to burn programs off to DVD you need a add-on piece of software like SantaDVD. See thread here:
http://www.xpmediacentre.com.au/comm...recording.html
There is a ton of information in this forum -- it takes some time to find your way around it. I remember the learning curve and all my early questions well.
Good luck -- a great way to spend Easter.
Gibbo