I use both Drive Image on laptop and true Image on Desktop. My desktop has a PCI RAID card fitted though I don't have a RAID configuration. DI doen't like this setup at all, the only way to make an image with DI is by booting from a floppy. Whereas on my laptop, I can create an image within windows (well it boots to DOS) but what I mean is I don't need to use the floppy version.
Acronis on the other hand works with my desktop as it should, i.e within windows. It's also much much faster than DI both laptop and desktop have similar speed processors, though Hard drive is smaller on laptop. Even so Acronis is faster.
I did originally have a lot of trouble with Acronis causing random crashes on the desktop. E-mailing Acronis support identified the possibility of faulty RAM which I was not even aware of. Running Microsoft's memory test program available on their website, sorry don't have link to hand, showed one of my RAM modules to have a fault. Replacing this solved my problem with Acronis crashing, as their support suggested.
To sum up both are capable programs, and both have recued me in the past. Acronis 8 is in my opinion a better and more featured program than the version of DI that I have (DI 2002) Also Acronis support is excellent. I can't comment on DI support as I've not used it since Powerquest was taken over by Norton.