[M5Rick]

@TheVazha.If depreciation hit is at the forefront of thoughts then a low miles, say 30-40k, pre 14 may suit you, it's the reason I bought one as mechanically the pre and pro lci's are the same and you can add the 14+ (facelift) grille and steering wheel as you go; mine was already fitted at sale with these together with the remote controlled exhaust butterflies and I prefer the round h/lamp ringlets to the thicker bottom cut off lights of the lci.
Tunes? I'm a believer in 'no mods no probs' as far as engine is concerned so take advice on that with reference to your road insurance allowances.