New amp or what?

Well im upgrading my floyd rose this week on my LTD, just replacing the blocks or screws or inserts, and the whole new OFR some time this summer and my dad would be paying for it. Im pretty sure im getting graduation money since im graduating 8th grade this june. I was at guitar center, and I was playing through an EVH 5150 and it sound great. Im pretty sure it was the 50 watt but i dont have 600 bucks, which was how much it was. Now Im not looking to spend ya know, mesa boogie dual rec and cab kinda money, but less than 500 bucks all tube and high gain, something similar to the EVH, but versatile and good quality, what would you recommend? I can't do like 50+ watts since im still living with my parents since im 14, but I want to really kick it into gain levels, something around dimebag sludge tone, but don't want my parent's screaming at me for sound complaints. I dont have an amp atm, and im using garageband for tone.