Online stores / seat post recommendations

Need a little more room in the cockpit so looking for a angled (not angled rather set back/offset an inch or so at the top of the post as apposed to a straight post) and lighter also. Most posts I am finding are 30.9mm mine is 30.0mm. The LBS guys suggested reaming the bike tube to use the larger 30.9 post. Those guys crack me up! :lol: Don't want to shim and use a smaller diameter post either. Any recommendations regarding online stores and seat post types / brands would be appreciated......