Help A Newbie With First Modification

[Orsm]

Hi guys

Would you be kind enough to give any help into what I should be upgrading on my car, I'm thinking about getting a remap done but not for a few months. I basically want the car to have better acceleration, I have a 63 plate Focus zetec sport 2.0 TDCI 160BHP powershift. Once it's out of first gear it really shifts it just seems a little sluggish off a standing spot.

I would have a guess and say a new exhaust and good air filter are a must but have no idea what make is best. (I would not be fitting these myself)

Cheers.