I would personally avoid EBC all together.
Ferodo Premiers get the thumbs up from me as a good road pad.
Stoptechs look expensive for what you get. Fancy drilled/grooved disks dont actually do very much, plain disks will by and large do the job just fine and are typically much cheaper. I've always just used decent quality disks from the motorfactors, really is no point spending huge money on fancy disks.
Juddering is probably caused by incorrect break-in and uneven pad deposits. Read stoptechs article about breaking in pads and disks properly before you invest in a new set:
http://stoptech.com/technical-suppor...nd-other-myths