If you're budget-restricted, your best bet is this Tommy Hilfiger Peacoat. It's a great piece, while not very expensive. In this price range, you can also take a look at this Lands' End Pea Coat. It's a product you're bound to love which also won't break the bank. You might also want to consider this London Fog Peacoat. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
For something in the middle of the price range, you're in luck with this Peserico Pea Coat in stock and waiting for you. You most certainly will fall in love with this piece. It is also worth looking at this Burberry Pea Coat. It's an attractive option both price and quality-wise.