FWIW, there's a review at DIYMA by a guy that owned an Opti full range D and one of the PDX's. He wouldn't go as far as to say the Lanzar was AS good, but it's definitely comparable.
Looking to spend around 250. I have been looking at a kicker thats 125x4 and a mb quart thats 100x4. I can go up to around 19 to 20 inches long. Guess I will have to settle for a little less power. I will be using it to power a pair of PG 8" subs, 4 ohm and most likely a set of the PG rsd comps.