What sites are best for ring games at .25/.50 and .50/$1 limits?

The FAQ for this forum makes reference to the big five--PartyPoker, PokerStars, ParadisePoker, UltimateBet, and PrimaPoker. Following the suggestion in the FAQ, I would like to ask those of you who have experience at these sites what your impressions are of their full ring games at the .25/.50 and .50/$1 limits? Any other sites you would recommend?

What I primarily look for, not surprisingly I assume, is a lot of choice among tables with high flop percentages and loose-aggressive games. High volume, lots of players seeing the flop, bigger pots.

I have found that my actual experience on some sites is contrary to the reviews I have read about the games at those limits, however, which is one reason I am curious to ask the readers on this forum for your own impressions.

Thanks.