I agree the prices are quite high, I would keep looking around.

LS vs GSR Depends on what you want out of your car.

If you are looking just for a daily driver, with no asperations of drag/autox/street speed, an RS/LS/GS is a great car.

It has more midrange than a GSR, making it more daily driver friendly. Insurance is less, and you don't need premium gas.

If you do want to race/drag/autox than a GSR is the right car. Oil coolers, stronger block, vtec, more HP and TQ above 6,000 rpm, better suspension out of the box, shorter gear ratios, etc