Make sure they're the XLT versions of the cabinets. A D410XLT is a much different cabinet than a D410T. The "XL" means extended lows, and the D410XLT is the common Eden 4x10 that lots of people love. A regular D410T (the "T" BTW, means tweeter) rolls off the low end a LOT faster than the XLT, and doesn't have the same midrange punch that folks either love or hate. Same applies to the other cabinets. So, look at the cabinets- if they have slot ports on both the top and the bottom they're probably XLT, otherwise they're probably XL (I've never seen a XST in the real world, so I don't know what they look like). Also check the input panel on the back. It'll have the model name written on it, including the impedance. "D410XLT-8" means a David series cabinet (D)with four 10" speakers (410), the extended low end cabinet desing, (XL), a tweeter (T) in 8 ohms (-8).
Too bad all companies don't make the distinctions between cabinets so clear.
John