You might want to wait for new speakers... your headunit alone will make your factory speakers sound much better.
The additional wattage makes the speakers sound pretty darn good.
also, if you upgrade your speakers to anything other than the low wattage Pioneer TS-G6843R that you originally chose,
you will need much more wattage then your headunit can produce to create the same quality of sound.
You will need a separate amp for it to sound good.
I know you don't want bass.
but a sub woofer is arguably one of the best improvements you can make to any woofer-less system.
You don't have to crank the sub up and rattle your truck its adjustable.
you just need it there to "fill in" the missing notes that just can be produced properly by the smaller speakers.
it makes a dramatic difference so much more "rich" sounding.
...Or you could be like many people and buy 200w RMS front speakers and run them off of a 18watt headunit.
Crank the **** out of them and make your ears bleed from the distortion.
then try to convince me that they sound better then factory.
If i were to recommend speakers though I would probably buy the pioneers you were going to get solely because of the low wattage requirements.
Toreador Red 05' FX4
4.0 4x4 A/Tran Ext.Cab Daily Driver. Nomads, BFG M/T's
Alpine 9857, JBL MS-8 DSP, US Acoustics 2x80w & 2x100w, Vifa 1" XT25 Dual Ring Radiator Tweeters 3k+ 24db slope, Dayton Audio 7" RS180-4 Mid-woofers 100Hz-3k 24db slope, 500w rms Kenwood Class-D Mono - JBL 10" GTO1014 Sealed. 100Hz- 12db slope