You first want to identify and save anything you want to keep from your Arch install, if you haven't already. You might experiment for awhile with some different distros to see what appeals most to you... many will let you run "live" from a DVD or USB stick so you can try them out without making any permanent changes. You might discover some that will use your printer/scanner straight away. As @
ryanvade suggested, Ubuntu or Linux Mint might be good choices for you.
You need to download an "ISO" file for the distro that you want to try. Then you have to use a special setting in your DVD burning software that is called something like "burn image" if using a DVD. You don't just copy the ISO file to a DVD... it won't boot. There are a few ways to get the ISO on to a USB, but it also has to be done correctly too so it will boot your computer. If you have access to a Windows computer, a program called Pendrive Linux usually works well to do this. Another program called unetbootin is available for Windows and Linux.
The ISO files are often available in both 32-bit and 64-bit formats. The 32-bit versions will run in any computer, but the 64-bit is usually better. When you ran the "uname -a" command earlier in this thread, it showed that you have a 64-bit computer, so I would recommend that you use those ISO's.
When you have a live DVD working and find what you like, it will also have the option to install to your computer. And it will overwrite and erase your Arch install if you want to do that, or it may also let you keep Arch if you want to keep it available too. "Dual booting" is a little more complicated, but it will probably work for you if you want to do that.
I'm not familiar with Quark Express but this link might give you some ideas... it has several programs that work in Linux that may be suitable:
http://www.appslick.com/quarkxpress-alternatives/