File sizes are pretty small on the D2hs...the D2x will use 8-gig cards. My personal preference is for SanDisk Extreme or Ultra cards. Two, 4-gig cards would be fine I think. Like apaflo mentioned...I do not think the D2hs was able to use really BIG cards...I thought it had some kind of Fat32 limitation of, perhaps 4 gigabytes...it's been a long time, but back in the day,the MAXIMUM size some of the earlier d-slrs could accept was way smaller than the HUGE cards we have available today.
One nice benefit of 4-gig cards is that a single DVD-R can back up each card full of images.