Are performance plug wires worth it??

Hi there,
Its time for spring tune up. I have an 89 s10 4.3 4x4. I was wondering if there was any real benefit from performance plugs, wires, coil on a stock engine. I understand the theory behind it. But I don't know if they provide enough of a noticeable improvement over OEM equipment to justify the extra money. My s10 runs good however lately (past month) it seems to be a bit sluggish and bogs down. It rides fine but when I step on the gas to accelerate and pass, or climb a hill it feels like my truck is bogging down, the engine gets nice and loud but I feel like I'm actually slowing down. Its between the 35-45 mph range. Any ideas? things I have replaced recently.

Coil (OEM from parts store)
Plugs (AC delco from parts store)
Wires (7mm OEM from parts store)
Cap&Rotor (OEM)
TPS sensor
MAP sensor
O2 sensor
EGR valve

Its been about 20 months since I have replaced all of these items except for the EGR (about a month ago). I am figuring the sensors should be ok and It is just time for a tune up. So back to my original question should I go with the OEM parts or will I see any benefit from more expensive parts? Any other suggestions as to what I should look for?

Just do a typical tune-up with the proper OEM parts. Ignition upgrades are only worth it really when you're running forced induction.