Corallife doesn't make a very good lighting system and it is cheaply made. Aquatraders has a cheaply made product as well, they seem to be getting better, but new reefers should probably stay away from their products. Current is better than the other two but I would try to find something a little better. Quality lighting is very important to successfully keeping coral, especially SPS. Tek light makes a really good T5 HO fixture that is relatively inexpensive (a 6 bulb unit should be perfect), Aqualight is another company that has good fixtures for a good price. The better companies use individual reflectors inside the fixture that are made from high quality polished aluminum, this significantly increases the light that is produced from the fixture. Giesemann makes a good bulb for the fixture, they also make a really cool fixture, but their fixtures are very expensive. T5's are excellent at penetrating the water column, so you shouldn't have too much trouble keeping a range of SPS with a T5 fixture. If you check out RC there is a range of cool SPS tanks that are powered by T5's. Metal halides have a really cool shimmer effect and are usually used with a pair of T5's or VHO's for actinic supplementation. Halides are going to be more expensive in terms of the cost of the fixture (if you get the T5's as well), they are also usually more expensive to run. But some people prefer them, me included, because of the look of the tank when its lit by halides. You may want to consider keeping the sand to about 1", instead of 5"-6". DSB's are great at removing nitrates, but they can become clogged and sometimes they can cause problems if the sand is disturbed. Instead consider a RDSB (remote deep sand bed), which can be placed in the fuge, in a bucket or on the back of the tank. It will also leave more room for rock, fish and coral. SpectraPure makes a killer RO/DI system that seems to be the preferred company for most experienced aquarists (I'm not sure if you can get one in Canada).
Here are a couple good sites to get stuff from:
Marinedepot.com
Premiumaquatics.com
