What to Wear to My WW Chan Appointment

Gentlemen,

Well I have my first appointment with Chan in March but have a dilemma. The only suit that I currently own is a two button, Brooks Brothers sack. I have read some posts either here or on Styleforum that suggest Chan was influenced by the style of clothes that were worn to the appointment.

I am commissioning a Savile Row-ish 3 piece, 2 button suit (high armholes and button stance, waist supression, etc.). I will be coming from work and would normally be in a uniform.

Thoughts? Thanks