Find a 12 that needs 150 watt's rms and get 2 of them. Make sure they are 2ohm dvc and wire them to a 1 ohm load. With that done, each sub will have around 155 watts rms so your total power will be about 300 watt's. Not a lot, but if you get that amp it is the only way to do this!
ok first off you dont have to wire it that way. also 2 isnt always better than one. i have the same exact amp and 1 12" Cerwin Vega V-Max. it pounds. you could go with 2 but i think 1 good sub sounds better than 2 cheaper or 2 underpowered subs. also for wiring. 2 subs ) either get 2 dual 2 ohm subs and wire each sub in parrallel and then wire the subs in series together. or get 2 single voice coil 4ohm subs and wire them in parrallel. both ways will give you 2 ohm load.
1 sub ) either get a single voice coil 2ohm sub or a dual 4ohm sub.