The "best" would be the one with the most overlay. I'm not sure but Party Poker recently had huge issues with big MTTs not meeting their guarantee. Maybe they've solved it by reducing the guarantee, but it may be worth to check it out...
Joined: Jan '12
Age: 29 (M)
My opinion, and i don't play that kind of buy.ins, but for what i see in the rooms, i would say the PKR like you getted a nice result, but also on the Pokerstars, with huge prizepools garanted every day or every couple a days in the week. But if you search on the big rooms online you will see tournaments with a range limit to $30 like you want, if you loking for rooms with less players with big garanteds, is not a good option i think.
Joined: Oct '14
Age: 31 (M)
I know you dont like pokerstars, but I have to suggest you to try out big 33$ there with 20k prizepool guarantee, its a good yournament it is always 25k+ prizepool and in weekends evem more!!! First place is nearly 5k$ and there isnt big competition... its around 800 players...