The other option would be to build a food poor city as your next city (which normally isn't really recommendable) just to hook up the stone and go after pyramids. Given the amount of forests around your capital the 'mids could be completed pretty fast.. And if you're going to SE heavy economy, then 'mids are even more attractive. But as for the land we can see right now, it doesn't really favor SE type economy. But I believe there's some better city sites in your west (though the AI's may beat you to those locations while you grab the stone and chop the 'mids). If you end up using a lot of specialists, then hooking up the stone now and getting pyramids will pay off in long run.