9800 GT or 8800GT

my current specification is
AMD athlon 64 3000+
1 GB ram DDR
160 GB HDD
geforce 6600 256mb
PSU 400W
now i want to change my VGA card...i want to purchase 9800GT. i had read from the previous post that 8800GT is better than 9800GT. it is the same as 8800GT but 9800GT has also phsyx ageia which 8800GT dont. suggest me...and also i want to ask that PUU 400W is enough for 9800GT....and how can the card will be delivered to saudia arabia...OCUK dont deliver to saudi arabia....it is expensive in retail store.....
AMD athlon 64 3000+
1 GB ram DDR
160 GB HDD
geforce 6600 256mb
PSU 400W
now i want to change my VGA card...i want to purchase 9800GT. i had read from the previous post that 8800GT is better than 9800GT. it is the same as 8800GT but 9800GT has also phsyx ageia which 8800GT dont. suggest me...and also i want to ask that PUU 400W is enough for 9800GT....and how can the card will be delivered to saudia arabia...OCUK dont deliver to saudi arabia....it is expensive in retail store.....