NEED A VIDEO CARD FOR A: HP M1270N PC

HAVING SOME TROUBLE SELECTING A NEW VIDEO CARD FOR THE HP M1270N MEDIA CENTER PC. RIGHT NOW I AM USING AN ATI X1600 512MB CARD. PROBLEM HAS BEEN THE LENGTH OF THE VIDEO CARDS I HAVE TRIED. TRIED USING THE 8800GT AND ATI 4850 BUT THEY ARE BOTH ABOUT AN INCH TOO LONG AND WOULD SLICE INTO THE 12 PIN CABLE FROM THE POWER SUPPLY THAT PLUGS INTO THE MOTHERBOARD. LOOKS LIKE BOTH CARDS ARE AROUND 9 INCHES AND NEED SOMETHING SHORTER BUT THEN I RUN INTO THE PROBLEM OF BUYING A LESSER CARD THAT MIGHT NOT MAKE IT WORTHWHILE. ALSO LOOKS LIKE THE 9600GT HAS THE SAME ISSUE IF I TRIED IT. WOULD BE NICE IF VIDEO CARD MAKERS PUT THE DIMENSIONS ON THE BOX! PLEASE HELP IF YOU CAN. MIGHT BE BETTER AND JUST PURCHASE A NEW PC AROUND THE END OF THE YEAR OR TRY BUILDING MY FIRST.HP1270N MEDIA CENTER, PENTIUM 4 530P HT 3.0 GHZ, INTEL 915P CHIPSETATI X1600 512MB, 2MB RAM PC3200.