Keep in mind though that both companies offer corporate discounts, particularly if you're purchasing in volume.
In a nutshell:
Macromedia MX 2004 StudioFull version: $900.00
Upgrade: $400.00
Adobe Creative SuiteFull Version: $1230.00 (Gasp)
Upgrade: $550.00 (Gasp again!)
The key here is 'upgrade'. See if you can ebay an earlier version for a couple hundred dollars and then purchase the upgrade. You may also be able to save some dollars by purchasing the software through a 3rd party vendor, which is who Macromedia and Adobe want you to buy their software from. Keep in mind their prices are higher to push you to their dealers. You can find third party vendors by using tools such as:
http://www.pricewatch.comhttp://www.mysimon.comAlso, these companies have trials for a reason. They know you're not made of gold and want you to purchase their software, use their 30 day trials... uninstalling and reinstalling if necessary. During that time, SAVE! You should be able to pickup and start using an earlier version for cheap and then purchase the upgrade later. Remember, in most cases you CAN pile upgrade upon upgrade, as long as you upgrade with every version. Skipping a generation of upgrades usually does not work.
Buying business software is always a big deal and it takes planning. Plan right and you should be able to get the software you need without any problems. Hope this helps.