You should seriously just save a bit more money and get the nice amp now. Jl amps are very nice just that they're pretty pricy for what they offer but clean. Another downside is that they suck a lot of juice, my friend had to replace his battery to a deep cycle battery to temporarily solve the problem. That jl amp only puts out around 75 watts rms. It'll be clean but you'll be sort of underpowering those diamond audio components. My friend has a set of those but I forget which one, he easily throws at least 150 watts rms but then again he uses an xtant amp for that, kinda pricy as well. I'd recommend sending at least 100 watts to the components, so they can get nice clean and loud. My infinity kappa perfects are being fed around 125 watts rms and they're still clean and loud. I have no doubt in my mind that the diamond audio components would sound better than my set at around the same wattage. That being said, if you want a 4 channel amp that will be clean i'd recommend this:

The JL audio 450/4 will give a bit more power around 150 watts rms, just perfect for those components.
http://www.jlaudio.com/amps/4504.html

 

there would be no way for me to afford that one. i'd already be strugling to get the 300/4 one. thanks for your help guys, i appreciate it.

now...
if i get 2 jl audio - 8w3v2's would i be able to power it all with the jl audio - 500/5?

edit: i bought a jl audio 500/5, and i'm taking a different route now. thanks for everyone's help.