Exact reason i went from my lovely 96 GSR to LS.
Everyone who thinks that the difference is worth the GAS and INS, is strait up wrong. Car and Driver got 15.7's with GS-R's and 16.0's with LS's. Thats nothing....
Plus i could feel the difference, the VTEC is nice, but its no major boost or anything, but it will surely rape an LS stock vs stock past 2nd gear.