I'm looking to get some aluminum tri-fold loading ramps to put the 700xx in my silverado 1500. I'm committed to a tri-fold because of the ease of setup (predetermined width) and ease of storage - under the xx. Does anyone have any recommendations? I'd like to stay under $150 and get the best quality for the money. It seems that durability / quality is difficult to determine other than load rating since wall thickness and material is rarely discussed. I'm considering these http://www.atvexpress.com/details7_trifold.html or something from discountramps.com such as this http://www.discountramps.com/atv-truck-ramps.htm. Can anyone speak from experience or recommend another site?