I don't think i will ever buy a new marker again, as they tend to drop so much money. plus the fact that if you have any problems most of the big manufacturers are happy to put things right for you for very little money.
I have bought a couple of new markers in the past and they do seem to have teething troubles sometimes which kind of puts a dampener on things
eblades are a great marker, with loads of upgrades available, and the likes of a Nexus marker are great value at the minute!! fast as anything out there.
Egos are great but can be a little harsh on paint, whereas proto and dm series seem to shoot anything.
Angels also are great markers but lose money faster than anything out there.
paintballers in general seem to change their markers farily often and buying second hand takes the sting out of it when you go to sell later on. loads of superb markers on here in mint condition anyway so have a look.