Without hearing ANY more a 230 watt is NOT sufficient for all of that equipment.. Minimum 350, and more would be better still. This also would be worthy of a decent supply maker. A cheaper, but poorly made 500 watt is not better than a 350 watt Antec. These are very expensive components in there that could get ruined!
What computer make/model as some (Dell, HP, Compaq, etc.) are so proprietary that this is not even an option to upgrade these units, and replacements from them are expensive.
So post back with some details and your thoughts, but $40-60 seems a good guess for something reasonable.