if the box/manual says it should include cables, then you should ask the store for them. the foreign imports such as from pixmania didnt have them i've read on other threads. i got the 950 model and that came with hdmi-hdmi AND dvi-hdmi so make sure you get both if the manual says you should have got them
you can make the 950 multi region via handset hack, you can probably do the same with the 850. have a look at
www.dvdrhelp.com as they list most handset hacks
btw, i've been reading recently of the problems playing avi files on the denon 1920, so i'm now glad i got the 950 and did wait
the 950 model is prettymuch the same as the 850, except it also plays sacd and dvda. its about £130 from richer sounds, but play.com might have it a bit cheaper. it's also worth paying the extra £20 for the 3 years warranty
there are plenty other threads with reviews of the 950, i'm glad i bought it. the only thing i miss is playing 5.1 sound on some avi files, but i understand this is a common issue with most divx capable dvd players. it plays some (probably older) avi's in 5.1, but refuses to play others