Following recent advice thru this forum (I was disappointed at 1 fps with V7), I now have a new PC based on:
Intel Core 2 Duo E6700 2.66 Ghz & Core 2 Duo MB (2 Gb Ram)
HDV 1080 m2t files play at full 25 fps on Windows Secondary display ( GeForce 7300 GS), even during transitions with titles supered over. Wow, so this is living!
On the downside, I got burgled this week - they took my Vaio Laptop, a D8 camcorder, a Mini Disc Recorder and a Portable DVD Player BUT - so thankfully, did not take my Z1 and any of my 10 external Hard Drives. They took the A$300 camcorder but left the A$10,000 one!!
Now I must be more thorough with backing up and protecting hardware/software - I thought it wouldn't happen to me, but .....