which pedal for plenty of sustain.....

Hootsmon

...but looooow(ish) on compression?

into a clean amp with 'buckers

joeyowen

ebow ;D

Pigtronix philosophers tone can, but might be too dirty

boss cs3, role back the comp?

nickb_boy

If your budget can stretch to it try the Origin Effects Sliderig. Endless sustain at the stomp of a switch!

indiansummer1

definitely wouldn't go for a boss or a dyna comp if you're looking for transparent compression. as stated above, philosopher's tone in theory offers unlimited sustain and you can blend in the dry signal for a more natural sound.

the barber tone press seems to come up quite cheaply in the classifieds and should also do a similar job (although i've not used one personally so couldn't comment on much sustain it offers).

spacecadet

Just watch Pete Thorns demo of the new Keeley comp. could do the job for cleans. If you need sustain with gain, probably a Suhr Riot. Or just lots of volume always works.

Hootsmon

^ yup,sustain with gain...no compression

monquixote

Boss Od1-x

Super dynamic but loads of sustain

meltedbuzzbox

joeyowen said:

ebow ;D

Pigtronix philosophers tone can, but might be too dirty

boss cs3, role back the comp?

pretty much my 2 suggestions but I was going to say the Pigtronix Philosophers King. That does clean sustain with minimal compression and optional grit. 

Ed the compressor (Marshall) is always a good cheap option too. 

xtrouble

You may laugh, but a Line 6 Dr Distorto pedal has an option for sustain only. You don't need the distortion on, and it has options like a sustainiac pckup. It doesn't work as well as one, obviously, but it does work, and you can probably pick one up for £40 or so.