Aluminum grips are $140 aftermarket. If they are still the style as shown in the pics on their website, and not the Hogues, then they are worth slightly more. Everything I have read has said aluminum grips of any kind vastly improve the feel and handling of these guns.
That combined with the SRT (and the beavertail if that is your thing), it seems like there is a lot of value in buying the Platinum Elite over the regular P229 Two-Tone, assuming you were going to get those upgrades anyway.