Need help in selection of a good audit firm in Lhr

[MuddassirACCA]

Please tell me how good are the following firms with respect to Lahore

Baker Tilly Mahmood Idrees Qamar & Co.
Avais Hyder Liaqut Nauman & Co. (RSM International)
Hassan Naeem & co (UHY)
Horwath Hussain Chaudhry
Riaz Ahmad & Co. (Nexia International)

Please rank the above firms with respect to Lahore and internationally.
Also please tell that I have heard that 2 partners of Riaz Ahmad & Co. have left so is the firm still good enough or have some of its good clients also left.
Also I can join Baker Tilly Mahmood Idrees Qamar & Co. Can u plz tell me how good is this firm? would it be beneficial for me to join this firm?

Plz I need an urgent response....