Never had any personal experience with Lazar but it claims to put out 1,600 at 1.3ohm, however, you can wire the D2s to 0.5ohm, 2ohm, or 8ohm. so at 2ohm you'd be looking at 550 watts each. Slightly under max suggested RMS, but under powering never hurt anyone, but then again it never made anyone's heart skip a beat. //content.invisioncic.com/y282845/emoticons/up2something.gif.dd110ecf3ae4b76050d87598f2f8de7c.gif But yes, that amp and sub will do you just fine if you aren't interested in more power, but keep in mind more power means more work(more money also). Upgrading electrical, more $$ on wire, amps, batterys and so it goes on and on. Don't run out and buy it just yet, wait til you hear from a few people who have had experience with Lanzar, I've never touched one.
I've heard great things about Obsidian, I'm sure you could get a bigger amp and push em a bit harder, 1k each?
(someone jump in on that)
But then again, you might have to look into electrical upgrades if you took the more power route.
Edit: Just saw the price, $300 isn't the best deal for that bad boy. You could surely get something with a bit more kick for three bills. Look around a bit more, people will start giving you suggestions, we also have a used car audio section here, where you can find thing's much cheaper then retail.
http://www.caraudio.com/forums/amplifier-classifieds/
Are you going for Sound Quality, or just pure "it's hard to breathe in here"
If your going for the "it's hard to breathe in here" (the hard hits that displace air) you'll need ( I guess you wont NEED it, but it'll make a difference) more power.