A Scanner (Darkly)

G and I are going to break down and get a new scanner. We've been piecing spreads, posters, and full wrap jackets for years and are tired of it. To tell the truth, we've been using the Epson GT 15000 (epson's old model)and Expression 10000XL (epson's new model) over at UArts and their 18" x 24"-ish scan beds have spoiled us. These scanners are a little pricey, so before plunging into one of them, I figured I'd see what you all are using for larger format input. Also, a while back I remember hearing about a scanner that uses two scan heads in order to catch less glare. If anyone has any thoughts or experience with this, I'd love to hear that as well. Thanks in advance!