e28 m535 subtle modifications

hi everyone, i'm in the uk and just bought my first bm. i like the old skool style so got a tidy m525 with 90k on the clock and no mods. i am looking to generally improve performance and handling, can anyone recommend good mods, the body work is tidy so will keep it pimptastic in alpine white. Its got a dogleg gearbox and i have had the bushes etc all replaced but is is still hard to get into gear, is this a common problem or should i get something else looked at ?

any help apreciated.