haha that is a great way to get an amp!, I got both of mine for $100 each because they are B-stock, only 1 problem so far with those, but the place i bought it from replaced it for free because it happened only like 2-3 months after I bought it.
I want to get an isolator like that because Ive noticed my lights dim a little when the sound is up, but ive only noticed it when the engine is running slow, like less than 1500 rpm's. When i do get the underdrive pulleys I will for sure have to increase the Idle speed so I dont drain my battery!
And I cant wait for my remote started to be installed, that will be great in summer and winter! and we get pretty harsh for both of those! lol