Induction kit is not really worth looking at if you do a lot of town driving as it sucks all the hot air from the engine in. I run one purely for the noise

and have some nice cold air feeds to it.
Panel filter is cool as uses the original box to shield from the heat. Drilling the box will get more air in, but again it will be hot air unless you are out on a run and cool air is flowing through.
If you want to go mad then look at the BMC cda system...if you have £180 spare
