After trying the trial and having no noticeable frame loss with 1080p, I ended up purchasing Action. I did try a few others, but ended up either with frame loss or not being able to capture the sound.
My main use is recording web-streams that cannot be downloaded (at least not easily), such as RTÃ‰ player. For example, yesterday RTÃ‰ closed down its analogue TV service and I forgot to schedule my PC to record the live news event. :doh: They posted this event on their website, but as they now use encrypted Adobe flash, it is not possible to download it (at least not with RTMPDump), so I played it full screen and recorded it with Action.
I'm sure Action will come in use for recording other web streams later. I never thought I'd be going back to the days of setting up a taping process, i.e. getting the playback source ready and finger on the record button (F9).
The only issue I encountered is that very few encoders outside of Action seems to be able to re-encode the AVI file it produces. E.g. AviDemux gives a green screen, Sony Vegas makes the picture too dark, Handbrake says "No title(s) found" and Xmedia only recognises the sound track.