Great decision!
The HHKB layout will grow on you. After a few weeks you will be used to the location of the arrow keys.
When I first received it I didn't understand all the hype about it, but after about 3 months I went back to my Filco and I realized how great the HHKB felt.
Now I mainly use the HHKB at work, and use blues or reds here at home for gaming etc. You're right though, while you stay interested in boards you can say good bye to your savings
Enjoy the board and welcome to geekhack!