Don't go for a R7 240, they are more than bad. Intel HD are almost better. 7750 are not bat but the price is too high...
Go for a hd 6570, very good price, and low profile: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150657
They are half price of the hd 7750, and have same performence, (because of theyr architecture, 6xxx familly are better than 7xxx and news...)
Go for a hd 6570, very good price, and low profile: http://www.newegg.com/Product/Product.aspx?Item=N82E16814150657
They are half price of the hd 7750, and have same performence, (because of theyr architecture, 6xxx familly are better than 7xxx and news...)