Almost anything from Epson should work. My XP-200 printer/scanner/copier works perfectly and was inexpensive. I believe I had to install a driver from the Epson website when I installed the VL 7.1 RC to get it to scan, but that's minor.
eMachines EL-1300G desktop, 1.6GHz AMD Athlon 2650e CPU, 4GB RAM, nVidia GeForce 6150 SE video
CentOS 6.5 (will try VL64-7.1 soon)
Toshiba Satellite A135-S4727, Intel Pentium T2080 / 1.73 GHz, 2GB RAM, Intel GMA 950
HP Mini 110 netbook, 1.6GHz Intel Atom CPU, 2GB RAM, Intel 950 video, VL 7.1