There's not alot of different EMG's. So if you want the most balanced EMG
bridge pup, go for an 85 or the splitable 89 or 89r. THe 81 is alot more scooped and has an insane amount of treble response. For neck, the 85, 89 are both nice choices and the EMG 60 has a unique sound. Nothing else out there really sounds like a 60. For the EMG 60 sound , think of Metallica's " Nothing Else Matters" intro.
Since you're playing through a GT-6, your guitar tone is going to get super squashed. But if you wnat to get pickups, Dimarzio's
TOne Zone, Evolution, Steve's Special, Drop SOnic, Double Whammy are all hot pickups. The right one will depend on what you want your guitar to do more or less of.