If you have a copy of DI5 (or DI2002) and it’s working for you, hang on to it— it’s still good, and still worth using. In fact, I’ve removed DI7 from my main system, and put back DI5: It continues to handle imaging of my main XP system easily and automatically. As long as you have a tool that’s working, there’s absolutely no reason to upgrade to the newer PowerQuest versions.
But if you do need to change from your current solution, or if you’re either new to imaging or need to get imaging software for a currently un-imaged PC, consider Bootit NG as a first option. It offers somuch for so little, it’s at least worth a look. Besides, it’s free to try, so you have nothing to lose.
If Bootit NG is too hard to use (and it will be for some— there’s no shame in wanting ease of use), I suggest you try Acronis’ products. They cost more than Bootit NG, but less than PowerQuest’s; and yet afford much the same polish and ease of use you find in PowerQuest’s products.
Sadly, I can see no reason at all to buy new copies of PowerQuest Drive Image or PartitionMagic. Competing products are now just as capable— or even more capable, in some instances— and much less expensive.
I’m using Bootit NG now on my most-complex multiboot system, and plan to install it on other systems as well. If you’re at all familiar with the concepts of partitioning, boot managment, and imaging, Bootit NG may likewise be all you need to replace multiple tools on your PC(s).