On the trials bike:
Tiagra mech, King Kog + Hyperglide cogs, KMC Thin, XTR cabling, Sram Rocket/Attack shifter.
On the 4X bike:
Sora mech, Sora cassette, XT cabling, XT shifter, PC99 chain.
Cheaper is better usually... Well, for the avarage rider anyways.
If you wanna ride like Vince, you will need to buy a 330 Euro Tigo/Try-All mech.