Just some considerations.

 

Can you wait for a rebate?

 

Often, you can get pretty good deals on hard discs with rebates.  My 80G Maxtor cost $50 after a 50 dollar one, and I've seen larger drives for the same price after offers.

 

Video card?  Taken care of?

 

The $24 case probably features a power supply manufactured by the Hak Foo Industrial Power Supply and Shrimp Company.  It may also not have as nice fit-and-finish.  Many Antec cases are, however, made by other firms