If I Buy These Two Components What Should Be The Third? (4" Help)

Aurasound NS4-255-8F Wideband 8 ohm Special from Madisound

Audax HM100C0 4" Carbon Fiber Cone Woofer from Madisound

Vifa TG9FD10-04 3.5" Full Range from Madisound

SB Acoustics SB12NRXF25-4, 4" midrange - 4 ohm from Madisound

Peerless PPB 830870 - 4" Poly Cone Woofer from Madisound

Parts Express:Tang Band W4-1337SD 4" Titanium Driver

Parts Express:Tang Band W4-657SH 4" Aluminum Driver

Parts Express:Tang Band W4-656SC 4" Shielded Driver

Parts Express:Tang Band W4-1320SJ 4" Bamboo Cone Driver

Parts Expressayton RS100-4 4" Reference Full-Range Driver 4 Ohm

I know this doesn't really help, but the point being you can do a lot with just $100.00.

For this scenario though, even though I threw several metal cone drivers in there, I'd stay away from a metal cone, except for the Dayton RS100. The Peerless tweeter is top notch, so you'll want to go with as a low a distortion woofer as you can afford. That nixes the Aura, and the lower priced Tang Band offerings. Not really sure if the Peerless HDS woofer hangs in there at this point either.

That leaves the two higher priced Tang Bands, the RS100, and the Audax. The Audax is an exceptional driver. The Tang Bands both use the same low distortion motor. The bamboo cone will exhibit a bit more warmth than the titanium, and might mesh better with the tweeter. The titanium cone though will exhibit better harmonic distortion due to the stiffer cone. The RS100 is just a solid driver that competes very well with it's higher priced counterparts. You really can't go wrong with it.

I think you should consider the Audax because it's not my money.
It's different. It's an excellent driver. If it's too much money, the Bamboo Tang Band will do very well.

In order, this is what I'd go with, given a $200.00 budget.

Audax
Tang Band Bamboo
RS100
Tang Band Titanium

I'm thinking that sticking with the Peerless PPB may, in fact, be the best way to go when you consider that the tweeter and mid-bass are both Peerless (so, good matching), plus the price, and the compactness of the PPB compared to the Tang-Band. The bamboo Tang-Band is the front running when not considering that matching factor - though I can't see a matching issue really. Though, with very little info on the Peerless I'd be going in blind.

In a unrelated matter I'm now considering buying 5 Dayton RS100s (or 8 if I double up on the fronts) and pairing them up with a nice tweeter each (what's large format tweeter that's closets to the Peerless but like half the price?) to build small surround sound speakers for my home audio. I need new small, compact speakers to replace my current 'too-big' ones and those Daytons are damn cheap while also being regarded as very good for the price. Add a sub to that and BAM - lookin' good! Of course I'd have to figure out a cross-over solution for each box for that... damn you speaker GAS!