First, you need to look at your business model and determine the best career path. What it is you are trying to achieve,? Then figure out if you would best be served by going 100% RIA, joining an independent B/D, or joining a regional firm. I would start by getting the book Going Independent from Cantella. Just go to their web site cantella.com and request it.
Liked Independent said, it really depends on what you are looking to achieve, you have the experience and established client base, however, there is a lot more that goes into the decision. Our website www.GoingIndie.com has some good information on going independent and the process and you can request our booklet on Going Independent as well.
Best of Luck,