Tengu = Drake on Steriods, if you are PVE'ing almost anything you want a missile boat, and one of the best missile boats bar none for speed tanking, active/passive/buffer tanking, dmg output, utility is the Tengu.

I rarely pvp with my tengu, as i prefer a lok for pvpi, however i have pvp'd with a HAM tengu, i wouldn't recommend it unless you are a hardcore tech 3 pilot, and have a spare Hull or 2. I have lost several tengus to pvp and they do empty a wallet pretty fast.

From experience, most WH dwellers have a Tech 3 POS setup so they are building their own or parts of them to reduce the cost of purchase.