I think there are a few mods that will satisfy for your needs but a lot them apply to slightly modded cars at the least.
GTEC 2 for example has ignition advance which means it will be better off boost. A 2.75" - 3" downpipe/exhaust will also help spool up times. Similarly if you have a FMIC, a straight induction mod will mean it will improve off boost performance by about 300+rpm. Lastly a superspool hybrid turbo from Barbz has had some rave reviews and apparently is the dogs bollox for spool up time.
For a standard car, a GTEC 1 must be the way to go though. Cheap and safe, will make a noticable difference to everyday driving and will give you an extra 25bhp! I'm sure this is what most people would recommend for a standard car, I know I would.