The Breede river becomes quite SCARY when you have a strong wind blowing. My last trip there we saw a capsized cabin boat, looked to be in the 16-17' class, being towed back to harbour by the NSRI. Luckily all crew were rescued by fellow boaters.
The problem that we have is that we often have limited time at our fishing destinations. So, you drive for 3 hours to get to Breede, so that you can have a weekend of fishing fun, only to get there and find that the weather prediction has changed/is wrong!! Now, faced with slightly stronger winds, what do you do?? If you have a larger, safer vessel, you can still SAFELY fish...........
Langebaan is most of the time dead flat in the morning with the ind picking up at around 12 'o clock. It too can become quite scary on a small boat, when the wind is blowing 20knts against the incoming tide, ESPECIALLY around the island.
If you're planning on a small estuary and rivers boat in FAIR weather conditions, the cathedral hull (tri-hull or multihull) boats are GREAT. They offer SUPERB stability at rest. They do however ride VERY hard in a bit of chop. Small semi-rigid inflatables are also GREAT. VERY safe boats, also have AWESOME stability. Look at the 4-5m class of boats. Both of these vessels are light enough to tow with a 1300cc car, easy to launch ANYWHERE and easy on the pockets too!!
If you're planning on taking the family with fishing and/or overnight fishing, ie. laying for large kob at night on the Breede, then a cabin boat is a better option. The cabin offers protection from the elememts (wind, rain, cold, etc).
For general all-round fishing, i prefer a centre console. You have easy access to the anchor (very important point ChristoB makes!!), you can fish easily at anchor, off the back of the boat, drift fish easily, as well as throw plugs and lures for the leeries or elf. VERY versatile.
The forward console offers more deck space AND is DRIER, as most of the water spray will be thrown up BEHIND the skipper, when riding.
There is no right or wrong choice, merely which one YOU prefer.
For centre consoles, look at the semi-rigid manufacturers. They offer a wide variety of stand-up and sit-down centre consoles. Cost varies from R2000-5000.
Check:
http://www.stingraymarine.com/boat-consoles.html
http://www.falconinflatables.co.za/falcon%20configuration.htm
http://www.wildcatrib.com/accessories.html