Im also in the market for wires. So far i have found that bosch makes some nice ones, and also magnacor makes a set. Magnacors are pretty expensive (about $90) but the bosch set sounds pretty promising at around $60. From what i understand the main feature to look for in wires is quality insulation so that magnetic fields and such do not interfere with the signal.
Just bought bosch 4+ plugs, but kind of procrastinating since i practially have to remove half the engine bay to get at the old ones.
I decided on going OEM. The reason why is they fit better than any of the aftermarkets and the OEM IS a really nice wireset. I checked the bosch out and I was not impressed. I also have had some problems with their wires in the past. Bosch has good spark plugs and good wipers but there wires are just ok.
"From what i understand the main feature to look for in wires is quality insulation so that magnetic fields and such do not interfere with the signal."
i don't think insulation does much for RF interference; this comes mostly from the design of the current carrying core and plug connector. several of the higher end plug wires use a twisted or spiral wrapped wire core for the current transmission of real wire with the RF suppression of carbon fiber cores. MSD claims that their high end set has only 40-50 ohms/ft resistance, but unless you have a ChevroFord, you gotta measure and cut. they do work well, tho, and shd outlast a couple of sets of carbon core wires. they are starting to make em for the sport compact market so they may have some for WRXs that would fit.
no expereince with Magnecors, but they seem to be popular with the SCCA types and the ones i've seen fit well. and since i've seen em used with a TEC2 setup, they must be OK on the RF interference front.