I love the LS/VTEC. And before people ask no I dont have one in my car but many of my friends in naples do. They make tons of power you can get the blocks much easier than the GSR and cheaper and if built right I honestly think they will kill a GSR bottom end in power (torque would for sure). You just cant rev them that high but unless you have a set of toda or junk high lift cams you really shouldnt need to go over 8500 anyway and at that point I would just add some ARP rod bolts to the mix.