Ooops! Missed something while adding those up. Didn't mean to go 100.00 over budget.
The sub is as good as you'll find under 250-300.00
The amplifiers are good for the money.
The crossovers are pretty simple to build. The Peerless, despite being inexpensive, are nice tweeters.
The goldwood 6.5s are a little boomy, but I find that most people prefer that sound.
To save some money, the Kenwoods cthomp21 has for 40.00 and skip the second bazooka amp, just use the HU would be a good start. That saves about 75.00.
The HU was just a sub 180.00 HU. No other reason to pick it. The Pioneer 6400 could be a suitable replacement. As would must sub-200.00 decks.