I just bitz ordered a Raider hull and deck to convert into a Reaper.
I've got two sets of the old, metal oop Ravager side hull armour to add around the prow, tons of vehicle bitz, and in lieu of a cylindrical cannon bit from an Imperium kit I may actually just use the shell of a pen.
I think it's a strong, versatile unit that gets passed over because it's not as accessible as a Ravager and not as points efficient, but I think if this unit were carried in GW stores or listed in the Codex you'd see more of it. While it sucks that its weapon is Heavy, the rate of fire makes up for this if you have to move, I think. I'm hoping to proxy test it soon...if it's not great, I'll save it for a Dark Creed Spearhead someday or make it a magnetized Raider/Reaper.