I tried to read as many reviews as possible before buying the archos 705 80gb from Amazon, but could not find many actual owner reviews so I thought I would add mine for anyone considering one of these.
Firstly my concerns: I was worried because I could not find one anywhere to see it in action before buying, only saw the 605 which was great, but I wanted the larger screen for video. I was worried the 260,000 colour screen would not be as good as the 605's 16 million colours and other reviews that said the screen is not as sharp on the 705. After a couple of days playing around with mine I can say the colours are fine (can you amagine 20,000 different shades of red?). I have not tried it side by side with the 605, but photos and video look great and the 7" screen is great - no eye strain at all.
What else can I say?
I think having the touch screen only (no buttons) works well - less to risk breaking - and you get a good remote if you want to avoid touching the screen. The touch screen is not as good as the ipod touch but works well enough once you get used to it.
The movies I had recorded on my PC's TV card went on in less than 5 minutes each, even for 3gb files with DVD resolution and they look really clear on the screen. It used to take a couple of hours to encode and transfer these onto my PSP.
Yes, the the optional DVR station cost you extra, but it works well - unfortunatley it only records TV at 640 by 480 resolution which is a shame when the screen is capable of more - I dont know if it will be capable of better with HD broadcasts. At least it records from a freeview box and from your DVD player - even protected discs, but these will only play on the device not onto your TV or PC - fair enough, I just want to be able to take a good movie when I am away from home not pirate copy it. The DVR station is also very good at playing your recordings and photos back on a large TV screen.
Music sounds good, but lets face it this thing is to big to replace your MP3 player. The built in speakers are okay too, a bit tinny but okay if you want to bin the ear buds for a bit.
Using the wifi to web browse is pretty good and video like you tube automatically plays at full screen size.
I am still experimenting with its capabilities - if I think of anything else I will add another review here. To finish off I would say I am very pleased with it so far and I am glad I went for the 705, I am prepared to carry the extra size and weight for the quality of the larger screen.
Finally I ordered it from Amazon on free delivery and it turned up three days later, great stuff - don't bother paying for express delivery.