ive heard that x-drilled are pretty much for show coz under heavy use cracks can develop from hole to hole.

Copied and pasted from Wilwoods site:

"Q: Why are some rotors drilled or slotted?
A: Rotors are drilled to reduce rotating weight, an issue near and dear to
racers searching for ways to minimize unsprung weight. Drilling diminishes
a rotor's durability and cooling capacity.

Slots or grooves in rotor faces are partly a carryover from the days of
asbestos pads. Asbestos and other organic pads were prone to "glazing" and
the slots tended to help "scrape or de-glaze" them. Drilling and slotting
rotors has become popular in street applications for their pure aesthetic
value. Wilwood has a large selection of drilled and slotted rotors for a
wide range of applications."

get crossdrilled

better heat disapaction than slotted/grooved, and u dont go thru brake pads every 3mths like you will with slots/grooves

im lookin around for a set of slotted front rotors for my 1.8. Do any 1.4/1.8 owners out there have any experiences or recommendations?

Al