PETG is said to combine the good properties of PLA and ABS.. I am no expert but I am printing PETG with the Mendel90 without problems. 240°C hotend and 90° for the bed are the temps I am using (not sure about the definite temps though, those are only the setting) as far as I know is the max Temp for the JHead 250°.
I´d recommend reading up on PETG and then decide for yourself, at the moment it is not as commonly available and usually more expensive than PLA or ABS... but I guess prices will drop.
Colorfabb XT is PETG if you need a starting point for your research
Here is a post about PET (and PETG later on) [
forums.reprap.org]
Edited 2 time(s). Last edit at 04/12/2015 02:27PM by D4RK1.