The Boss Media sites that offer the following bonus would likely be a good place to start. You can play up to 3 sites. $20 deposit, must play 500 raked hands for a $100 bonus. After 100 raked hands, $30 of the money will be released, with the remaining $70 coming after another 400 raked hands. If you are comfortable multi tabling 4 tables, it will take about 5 hours to complete. You can play ANY limit of LHE despite what the T&C says, meaning you can play the .10/.20 tables. There are usually two 5 man tables and one 10 man table. I did those 3 and did one .25/50 table. The tables are very soft, so you should do well.

The three most popular Boss Media sites of choice lately have been Sportingbet.com, Casino.net, and Totalpoker.com. These sites offer the bonus I've mentioned.