Correspondence Resources?

Okay, so I've decided to get into correspondence style Chess seriously, both here and with the USCF. In addition, I got a hefty performance bonus last month, and I'm expecting a sizable tax rebate. So I have a good chunk of money I could invest in Chess resources. What would be best:

• One of the big databases?
• The MCO or ECO (I have SCO)?
• A bunch of specific books on the openings I'm using?
• Screw it and work on my tactics?
• Something else?

Not that these are necessarily mutually exclusive. I'm just looking for some advice on good resources for a postal player.

I would choose chessbase and one of the databases over opening books. Chessbase has features for opening study and with a weekly influx of games from twic or their cbm service you will have the latest info on openings played. Plus CB will give you an easy way to track your games. The only downside is that it is not cheap. ChessOK has a similar product named Chess Assistant, but I don't personally know how it compares. CB seems to be the standard.

John Nunn's latest edition of Secrets of Practical Chess has really good info on using computers for study in particular in opening work.

Tactics you can already work on here with the tactics trainer.

Chessbase is the way to go. Mega base has weekly updates and lots of annotated games. You can enter any position from an opening and it will search and tell you what has been played, how often, strongest players etc.

The Ultra Correspondence CD from ChessBase is not that good--I use Harding's CD (Chess Mail web site). While I have ECO and MCO I rarely use them but have specific books for openings I play (but then I have almost every chess book)