I have a Samsung CLP 415NW color laser printer that is 22 months old. I would still be using my old HP 1300 LaserJet but I couldn't find toner cartridges that didn't have expired chips and HP wouldn't write a driver for Win 7 (HP is notorious for stunts like that, one of several reasons I'm boycotting them).
I have two scanners. The one that gets the heaviest use by far is my ScanSnap S1500 ADF (Automatic Document Feed) duplexing scanner. I've had it almost five years. Despite extremely heavy use, it is still running strong. This is one scanner that isn't TWAIN compliant. It scans directly to JPEG, uses Adobe Acrobat to scan directly to PDF (including searchable PDFs; the scanner also comes with OCR software), and Word docs. I use it for home office paperwork reduction (pretty much paperwork elimination) and scanning my enormous book collection to PDFs (a long, arduous process still in progress that would have been impossible using a flat bed scanner). Despite being a lightning fast, versatile, compact, little workhorse I would never be without, it does have some limitations, the main ones being mediocre color scanning and paper size, resolution, and paper weight limitations. For example, it can't handle cardboard or other thick items, especially if they are rigid (such as plastic), or paper wider than 8.5".
My other scanner is a Canon 9000F CanoScan flatbed scanner. I use it for old photos and other high quality color scans and for items I can't feed through my ADF scanner. This scanner is TWAIN compliant. I've had it about four years.