How the hell do you have a 5-year-old, highly profitable company with multiple founders and $3MM - $10MM in annual revenues, and think that HN is a better place to ask this than to your attorneys and bankers?
We have used lawyers in the UK and US (for contract advice, that kind of thing) but we don't have one I'd turn to if I were in this position. It's certainly not impossible to reach this point without that kind of advisor around.
[Note: we started in the UK, which could be a factor]