Have you not read the recent J5 and J7 hate threads all over the shop!!

2 mates running J7's have no issues,  expect the occasional chicken sound.

juicy 3's below but limited stock

http://www.chainreactioncycles.com/Models.aspx?ModelID=22185

juicy 5's but cheaper than evans!

http://www.chainreactioncycles.com/Models.aspx?ModelID=13512

3's are just no 2 bolt clamp to attach to the bars isn't it,  so GOT to remove your grips,  which if you've not go any on yet or there remove,  then no real advantage.

5's also have some funny pad adjuster for "ultimate break effiency", which i've been told is a completly useless feature!

I have lockon grips, so it ain't too much trouble getting them on and off, the one time it needed to

be done!

7's have that,  not 5's.

If you've got lockons,  then might aswell run 3's for sure.

Anyone tried the bike hut hydraulics from halfords?

Oooh! - runaway...

to be fair 525's are my next fav disk brake!!!

M535s are the same price, at CRC, but the newer model and get even better reviews.

I've got a pair of 'em and they're way better than my old minis and as good as my Juicy 7s, without all the adjustment of the 7s.

Tell that to my rear M535 Jimmy,  1 piston moves in and out under braking,  but remains in the fully open position,  where as the other one keeps winding out,  and have to use mole grips to get it back in.

It's only 1 M535,  but I'm not going to recommend them,  where as my M525 worked perfectly for 3years+++

Didn't have it 3months before it all went wrong,  as long as I keep centralising the pads,  and don't let them wear out to far so the 1 piston pops out they still work fine,  so it's not a issue and I'm not racing out to replace them,  I've tried the normal stuff to free them up aswell,  STRANGE comes to mind.

The new XT Servo Waves sound great,  so aim to go that way when they've had more testing from a mate,  K18's are proven,  but £120 a shot,  compared to £170 for a pair,  puts me off some what.