g8 gt or g8 gxp?

[455_PWR]

I am in the market for a g8. I am hoping to find a low low miles stryker blue metallic gt with all options (19" rims, leather, sunroof), or a stryker blue metallic gxp with sunroof. I know that the cars have different suspension systems, brake systems, and motors. I see most gt's around $25-29k and the gxp's are around $40k.

My question is: is the gxp worth the extra $10k? I know the heads are the same except that the gxp has sodium filled valves. For an extra $10k for 50hp, I was thinking I could go buy a 99 trans am. For those who own both or have driven both, are they that different? I know most people say they are completely different cars.

The only reason I am asking is this is the one time in my life I can afford either, so it's now or never! However, the car will most likely be driven in snow since I am not driving the 75 ta in winter...