I think the p heads would be good for what your wanting to do right now. Only thing is you will need different headers if you want it done right. And they usually arent cheap. You could use the gt40p shorty headers or get a set of Mac longtubes. But by the time you get a good set of p heads and headers your prolly looking at around 500-700 bucks. I think if i were gonna get a set of stock ported heads id go with the powerheads.
www.powerheads.com