Not sure what you mean
Can you explain more about your requirements?
You ask about hardware, but what hardware, a scanner? Or a better computer?
What software do you have now?
If you mean a scanner then I can't help as I know little about them, but a scanner should be available around or below $200. Some ideas here; http://www.pcmag.com/products/1665?price=[150%20TO%20250]
But if you mean a computer, why do your two computers, Win 7 and XP, not work properly for you now?
Tell us more so we have an idea of the requirements.