By the way it sounded in your post, you want to run multiple subs off of that amp. If you are looking at the type R's, you can run them, but look into the dual 2 ohm model if you want to run 2. This makes for wiring each sub independently in parallel so it acts as a 1 ohm load, then wiring the subs together in series to raise the impedence to 2 ohms. If you did that, you'd be sending (assuming the amp's rating is correct) 500 watts to each driver which would work well.
Now, you could also look at that amp, get a single dual 2 ohm sub and wire it up to 4 ohms, giving approx 500 watts (assuming the amp doubles power at 2 vs 4 ohms, though it's not always true). Then if you wanted to upgrade later with more cash, pick up the second one and you'd be in the situation above.