No,
I have JBL GTO 8628 5x7 speakers all round in front doors and rear 1/4 - I have a 3 door Focus.
Head unit is rated as 52W x 4 and the JBL's are rated as 60W RMS & 180W peak power.
The sound quality really is great, on a 'bang for your buck' basis you wont get better than JBL's - thats just my opinion.