I suggested mono first, especially for a new caster, not only for the cost facter but because it's easier to work with (make knots, load onto the reel etc) and generally doesn't cut your fingers (as much) as the braids.
There's nothing wrong with mono, beginner or surf vet. Mono still takes it's good share of big fish. The biggest bass I had last year was taken on mono.
The braids have some advantages such as distance, no stretch, better feel of the lure or fish, and heavier test for smaller diameter. But they also take some getting use to, are more expensive, require special knots and leaders, etc.
Jaiem
ArtsNFlies.com