I do agree with using the hydro setup. In the end you have a better product. Since you've already put so much into your car so far, this should almost be a given.
WRX pedals would probably be the easiest ones to install. It's too bad you weren't closer as you could see how good the pedals fit.
See
http://svx-iw.com/pics/5speed/images/IM002358.jpg for a pic of the SVX pedals beside the WRX pedals. The only modification was I cut the top 2 bolt holes off the SVX assembly (near the brake switch) and welded it to the end of the WRX assembly.