Ok, first off, i bought that component set for $100 off EBAY so you can do it too. It's most common for installation of a component set to cost $75 so you're up to $175 so far without shipping. So i guess if you want to pay $165 for some soundproofing around your speakers go for it. Second off, like i said before, i have this component set in my car right now. There is a big and now infamous problem with changing out four ohm speakers like those alpines with the two ohm factory speakers that come stock. If you have the monsoon still in your car, the new alpines will be getting half of the power that the stock speakers got due to the change in resistance. This really sucks. If you're gonna spend this much money anyways i think a good idea would be to buy these
http://www.cardomain.com/item/IDSCXS62. They are top of the line quality and i know where you can get them for $279 shipped. And best of all they have two ohm impedance so they will be getting all of the power that the stock speaker got unlike the alpines. PM if you have any questions, now that i've already messed up on my stereo, this is the route i wished i would have gone.