Upgrading video card size is an issue

Howdy all OK Im upgrading my video card right now I have an XFX 9800 GT now mine doesnt but some of the newer versions have an hdmi on them so dont know if it matters now the problem is that my what ever card I end up getting must be a single slot card as directly below my pci express 2.0 16x slot I have a tv tuner card with two seperate tuners so I can record 2 shows at once or record one and watch onethat is pci-e 1.0 and cant go into any other slots so moving it is out of the question so what is the most powerfull single slot video card available also found this one that seemed pretty powerfull a gt 430 made by msi will that be more powerfull than my 9800 gt here is a link for the card on new egg thanks

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127541&cm_re=msi_gt_430-_-14-127-541-_-Product

If this isnt it what is the most powerfull single slot video card

Howdy all OK Im upgrading my video card right now I have an XFX 9800 GT now mine doesnt but some of the newer versions have an hdmi on them so dont know if it matters now the problem is that my what ever card I end up getting must be a single slot card as directly below my pci express 2.0 16x slot I have a tv tuner card with two seperate tuners so I can record 2 shows at once or record one and watch onethat is pci-e 1.0 and cant go into any other slots so moving it is out of the question so what is the most powerfull single slot video card available also found this one that seemed pretty powerfull a gt 430 made by msi will that be more powerfull than my 9800 gt here is a link for the card on new egg thanks

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127541&cm_re=msi_gt_430-_-14-127-541-_-Product

If this isnt it what is the most powerfull single slot video card

plvness

the most powerful single slot card isnt out yet.. the sparkle gtx 570 one edition

but if you want to ignore that card and take say.. 2nd place this is what your after

http://www.newegg.com/Product/Product.aspx?Item=N82E16814162072

too pricey?

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150501&cm_re=hd_5770-_-14-150-501-_-Product

anything below this last 2 and final cards wont beat your 9800gt anytime soon

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127558&cm_re=gts_450-_-14-127-558-_-Product

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150501&cm_re=hd_5770-_-14-150-501-_-Product

there you are.. your options

Please use periods next time.

Thanks guys youve been a big help