For scanning magazines, you cannot get any better than debinding the magazine and running it through an actual scanner. Book scanners of the type you're talking about merely take a photo of the pages. This can work (crudely) for books, because they're dealing almost entirely with text as opposed to finely-detailed artwork, and the gutter (the point where the two pages meet in the center) is always composed of white space. With magazines, this is exactly the opposite: magazines are printed full-bleed (ink all the way to the edges of the pages, including the gutter), and feature far more finely-detailed artwork than they do text.
If you want to do it for your own personal collection, a book scanner is a low-cost, minimal-effort solution. If you're wanting to do it for our site, the end result won't be high-quality, and we likely won't use them here. You'll want a good scanner with a document feeder; I'm sure some of the other members can recommend specific brands and models. I'm the only one here living in the stone age, scanning stuff by hand-placing it on the glass, and trust me, you have better things to do with your time.
*huggles*
Areala