Help me choose new rims

I know this has been discussed several times, but I'd like to hear from someone who has first hand experience. I plan on upgrading to 17's in the next couple of months. My choices are down to the Racing Hart CP8R and 5Zigen Inperio M0-5. I prefer the looks of the M0-5, but the CP8R has the weight advantage (12 pounds compared to 19 pounds). Will I notice a drastic difference in performance between the two or will the gains provided by the lighter wheel be minimal? The CP8R costs roughly $700 more and I'd rather put the money someplace else if possible without sacrificing too much performance. Thanks in advance!

Lighter wheels are always better, but it's always more $$$.

A cheaper way to get a lighter wheel would be to just get 16's or 15's