I have a Diamond Tdx in either a dual 4 or dual 2 ohm configuration. Recommended enclosure is around .65 cubes sealed and they are rated for 500 watts but will easily take more. Both are in mint condition and have seen very little use.
i have a 1508 ready to go if you're interested and I'm about to build a 10" RD Alpha v2 I forgot the coils I ordered though, it's been too long... prolly D2