Thomas,
Beleive me, the members of the board can always find ways to help you spend money.
You list your receiver and your two subs, I presume cause those are what you're considering upgrading right now. But what do you have in the way of other speakers? Usually upgrading your speakers is the single most dramatic improvement you can make. But it depends on what speakers you're listening to already. If you already own a 4802, you may likely have speakers that couldn't begin to be upgraded on only $3k.
The 4802 is already a beast of unit. Although selling that and putting it with your budget, you'd be in a very nice position to move into some nice seperates.
Help us get a better feel for the rest of your system so we can more accurately help you find the weekest link that should be upgraded next.