Make sure the width of your Graphtec can cut a minimum of 1370 (48") wide. All cutters cat fit material that's wider than the max cut-width. So a 54" or 64" (140 or 160) cutter is the way to go. Whether cutting, or cross-cutting, the same applies.
www.graphtecamerica.com has info and, I think, a dealer locator.
www.signwarehouse.com has Graphtec 8000s and Vinyl Express Q Series. A Q160 might save you money and get you the features you require.
Best,
Jim