Stakes at which intelligent LAG play become +EV?

[tagtastic]

I've currently played low stakes NL HE for more than a year now very successfully - and despite what many would believe, a very LAG image is totally unsuccessful at limits like .10/.25 and .25/.50 (all 6 max) at Party - fold equity is simply non existant. What levels does good play really reward you? I currently multi-table .25/.50 NL for a ridiculously massive profit (>15PTBB/100). Every once in a while I feel the need to play real poker (more recently) and generally at these limits it makes me small money with the occasional large loss of a big hand to a donk after he makes some ridiculous call. I've played 500,000+ hands at .10/.25 & .25/.50 and consider myself the most profitable player on Party at these limits in NL (seriously), I just have one question, at what limits can I start to play real poker?

I'm drunk right now (in all seriousness), otherwise I would never dream of revealing this information. An honest reponse would be appreciated. Is NL1000 on Party rewarding of good play (the highest limits that there are 6max table)? If not I feel there's honestly more profit available at .25/.50.