The apps bundled with scanners are usually cut down at best. but normally just plain useless. If all you want is the most basic of fetures, then they will do fine (although I must confess to not having used the products you mentioned)
As to what to replace it with. Most pros will point you to something like Adobe PhotoShop, but this is pricey and can be a bit daunting for the beginner.. I use Jasc's Paint Shop Pro - that seems to be easy to get to use, but has the features when you're a bit more advanced.
All the best