Any suggestions for SDI card for G5 or Mac Pro?

[Kit]

Hi,

I have recently bought a Panasonic AJ-SDX900P with the optional SDI
board installed. This camcorder records 525-line NTSC at 60i onto
DVCPRO tapes. It can also record 24p and 30p (both captured over 60i)
with 4:2:2 colour compression.

I am a very light user and prefer not to buy a deck but instead
play-out the tapes direct from camcorder and record into my Mac.
However, my Mac has no SDI input port. So I would be very grateful to
receive suggestions of which card, board or box might suit me best.

Currently, my Mac is a G5 Dual 2.5GHz. I plan to get a Mac Pro sooner
or later (but I shall keep the G5 Dual) so if there is an especially
attractive Intel-based solution then I might buy the Mac Pro sooner.

Thank you!