Re: Sports intake
ok. i would not recommend the K&N panel filter, too many horror stories of knackered MAF sensors, plus, they are a perfect example of 'paying for the name'. Autodelta do a sports panel filter for just over £20. this one wont knacker anything.
the stock intake is good if your not planning on going mad with enigne mods so just stick a better filter in and leave the rest alone.. for now.
as for remaps, what you need to look past is the 'peak gain'.. yes, 10bhp may be what you gain as a maximum (e, 130bhp rather than 120 at 6000rpm) but its what you get across the rev range that makes the difference. you may find at present your making 65bhp (for example, random number) at 3000rpm, after the remap you may be making 90bhp at 3000rpm so whilst your only gaining 10 peak, your getting much improved lower down power, where its most useful.
dont be afraid of the price, they really are worth it. angel charge 275 i believe it is and offer up to 14bhp gain.
no need for a BMC CDA unless, as stated, your planning a lot of work, and have the money to spend! the gains for a CDA/Remap/exhaust are next to nothing over Stock filter/Remap/exhaust... get the idea?