Before getting my e90 I nearly went for 159 TI... Has to be a TI though - they look great! I can see why you're drawn to them OP.
The engines aren't great though. The 1.9 diesel is probably the best option as the v6 is too slow and thirsty. The 5 pot diesel is ok - it's what I would have gone for but it's not a patch on the BMW 6 pot derv unit.
Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.