Plymouth-based Wealth Enhancement Group says it has a deal to buy Darien, Conn.-based HHG & Co. Wealth Enhancement Group has nearly $4.5 billion in assets under management (including subsidiary Wealth Enhancement Advisory Services). HHG & Co. is a registered investment advisor managing more than $1 billion in assets. Terms of the acquisition were not disclosed. The deal is expected to close in the second quarter. HHG & Co. was founded in 1986 and provides financial planning, investment management,...