I'm still playing with the trial version of Paint Shop Pro X, and am now becoming a little disappointed that Corel have omitted some useful stuff from this version, and IMHO opinion it doesn't bode well for future editions of Paint Shop Pro. The JASC versions always came with Animation Shop for free, but that's now omitted - you have to buy it as a separate package, but quite apart from this there are one or two big niggles for me.
Missing now is the Point To Point mask drawng tool which I use a lot - it's now much more difficult to draw freehand masks around difficult shapes and is just lunacy with no reason for it I can see.
Also gone, is the Colour Replacer Tool.
One of the best things about PSP has always been it's image browser where you can scroll through hundreds of thumbnails full screen, to quickly find an image. The browser is still there, but it now opens in a narrow window at the bottom of the screen and scrolling through images is a major chore. Overall the presentation of the work area is far more graphically intense and very like versions of Corel Paint I've used in the past.
None of these things are likely to worry newcomers but old users of Paint Shop Pro may find the changes a tad irksome, so I'd recommend trying before buying for those people. It's not all bad, there are mprovements such as RAW file handling and you now get High Pass sharpening, Noise Reduction, and some other useful stuff. It's very slanted towards the beginner with lots of help on hand, and one button 'Do It All' filters which don't really hack it but newbies may find useful initially.The more advanced stuff is there if you want it and you can customise the tool menu to hide away any stuff you don't use.
At the moment, I'm finding myself switching between Paint Shop Pro 7 and Pro X working on most images, so PSP X doesn't satisfy me as a complete package, and I don't see myself buying it unless my feelings change.
Another option is to get one of the later versions of PSP when it was still under the JASC umbrella which do have many of the improvements incorporated in the X version without the hang-ups.