Spiers, I got my HP 130 from a retailer that sells most wide format printer brands, and also prints and sells roll media.
They feel the Epson 4000 is not as good as the 130, one because of bronzing, two because cost per print and three the incompatibility with some Vinyls/Tyveks and gloss papers. Also the 4000 only prints 17" wide.
They could have cared less what I bought, but, like I do now, are just so impressed with the 130 they recomend it over the Epsons (at least untill the new Canon big boy arrives)
Gav