At the moment, I have a Stagg Flying V and a Roland Microcube, but I want a new guitar because the V doesnt stay in tune and its been getting slightly uncomfortable lately. I was wondering if anybody had any suggestions for a new guitar I could save up for? I'd be willing to spend up to about 600GBP ($1200), I play Metallica, Guns N' Roses, Nirvana, ACDC and some more heavy metal. I'd like a Floyd Rose, but I dont mind that much.

Gibson SG
Gibson Explorer
Ibanez RG1570
Ibanez PGM301
Some form of ESP guitar

Those come to mind, but what amp are you running through, body shape preferences, do you need/want a Tremolo system?