I'm surprised at people saying the anodized finish is delicate. I've got an eight year-old Superlight and a twelve month old Heckler, both anodized, and they both still look like new. I'm not saying that the powdercoat option is delicate, but the anodized frames look new for ever in my experience.
I think the tolerances around the pivot joints etc are better on the anodized frames too (I had a painted Heckler before the anodized one, until it was stolen).
I also think the RP23 is easily worth the upgrade, especially on a 'simple' single pivot bike. They really work, and I can only imagine the small amount of weight you would save going for a basic Float shock. Maybe the same you save by going for anodized over painted. With the pro-pedal on the bike sits up a bit for climbing, effectively eliminates bob and gives a taughter back end. With it switched off the bike sits into its travel a little more, giving a slightly slacker head angle and a much more plush action. Maybe these traits suit the Heckler better than a superlight, it probably depends on how you ride.
I like set-and-forget suspension, but I do like the RP23, a lot.
If you want to save money don't buy a SantaCruz.