Reply to IS 100 Watts For A PA SYSTEM Sufficiant

I'm currently looking becoming a Mobile/Pub/Wedding DJ and over the last year have been putting together some gear consisting of Pioneer CDJ 200's, DJM 400 Mixer, Moonflower lights, lasers, smoke machine, and portable deck stand with T bar for the lights. On one of the online store had the Peavey Audio Performer pack PA System which is rated at 100 watts RMS and I'm wondering if it will be loud enough for Pub Dj'ing, and Wedding, according to my father who used to play in a band, believe it's sufficient, but I'd like to find out some more info as I'm a newbie when it comes to PA Systems...

http://www.amazon.co.uk/Peavey-APP-A...=cm_cr_pr_pb_t