XEON S
For about $600 more than the Xeon, you get:	Benefits of upgrades:
Fox 32 Float RL fork	Alloy steerer for greater weight savings. Air sprung for greater tuning options. Lockout for better climbing performance. Fox reliability.
RockShox Pearl 3.3 rear shock	3-position switch allows you to lock rear shock out, open compression damping, and enable compression damping.
Truvativ Stylo 3.3 GXP crankset	50g lighter than FireX 3.3. High-grade 7050 alloy arms. All 3 chainrings are 7075 alloy.
Avid Juicy 5 hydraulic disc brakes	Better stopping power and modulation than the Juicy 3. 40g lighter than Juicy 3. Indexed reach adjustment.
WTB ExiWolf Race tire with folding bead	Folding bead tires are more supple and weigh less than wire bead. Approximate 100g per tire weight savings!
SRAM X.9 rear derailleur and shifters	75g weight savings over X.7. Lightest rear derailleur in its class. Adjustable 2-position clamp. Zero Loss shifter lever pull for crisper shifting.
Ritchey Pro V2 seatpost	30g lighter than Comp post. Higher grade aluminum (2014 vs. 6061)