I have 2 Ikelite housings and had no issues at all and consider Ikelite as a very experienced manufacturer building the best "cheap" housings.
Get a quote for the Ikelite and the Aquatica/Nauticam housing, including ports, zoom rings etc and you will realize that the differenc in price is more than the often advertised few houndred bucks. If you are a "(semi)professional" UW Photographer a aluminium housing may be the better choice as it is more forgiving to some bangs but i find the Ikelite quite sturdy. When you drop your rig from 5 ft and it falls on the port i guess that both would have some damage on the port clsoing mechanism.
Also consider that Ikelite provide a free i-ttl/e-ttl converter built-in so you can attach the DS series strobes by cable and have a working TTL system, while other housings may need to aquire external converters or don't provide TTL. The only backdraw on Ikelite is that you can't use optical slave strobes on most of their D-SLR housings as the housing don't allow the internal strobe to open and fire to trigger a slave strobe.
Modern "TTL" strobes like the INON D-2000, S-2000, Z-240 and some of the S&S YS series provide perfectly working "TTL" cirquits reading the preflash from the camera to regulate the output power. Using a slave strobe will eliminate the electrical connection as a potential source of troubles.
Chris