Its Roofrack World/Sunshade Products you're referring to Chris.
If your a BikeSA (and possibly either RAA) member you get 10% discount at Roofrack City (Gilbert St, city).
I have a Thule type fork mount roof rack for my my car. I picked up the roof racks themselves on eBay for about $100 (not brand name, but do the job) and bought the bike rack from AutoBarn last year when they had 20% off everything. Got the rack for about $140 from memory, normally about $170
Thule racks and carriers RULE.
This is the kind of bike rack I'm keen to look into.
I've not investigated any further than to say, "oooh, that looks fancy and I like it" so I've no idea on how good they are etc, but I think they look like a viable option.
(not to mention though, freaking expensive)
Good thing to have the bikes off the roof I say. Low clearance and mental brainfade = damaged bike, not to mention having to lift your bike onto the top of the car. I have a little hatchback Peugeot and bought a great Thule rack that does not require removal of wheels and was not terribly expensive. Bit fiddly to put on but once there its all good. The other problem with the larger rear racks is clearance at the rear of the car when you go through a deep drain. My little rack has the bikes high enough for clearance, but low enough not to be a real issue under a carport (which we don't have).
I've seen a very good towball mounted 2 bike carrier which is quick and easy to use - the Gripsport "Hi-Ride" carrier:
This will solve the problem of deep drains. Expensive though @ $398.
Yakima make this one which is described as a budget version. Budget compared to the Thule Euroway at about $700!!! The Gripsport I think has corrosion problems.
I was about to say expensive. I too prefer a carrier where the wheels sit in a channel while one clamps the bike. Less likely to get dirt on my clothes. I bought a cheaper version online from Torpedo7. Yet to use it and give a review.
I have one similar to this, and it fits the kids bikes and my mtb, would probably fit their bikes plus my roadie too, but i normally dont ride that one with them. I find its quick and easy to use folds up to be stored in the boot area so you never need to worry about forgetting it or the surprise flat pick up
I've got Rola's on one car, three bikes worth, two forward and one backwards.
4 Rhino's on the ute, three on the cab (one backwards) and one on the canopy
The Rola's look aerodynamic but probably aren't, the Rhino's are lockable.
All work well. Only problem is the Rola skewers are cheap and rust, have had one rust through and snap, nasty. So I buy cheap alloy skewers from the LBS.
Got them all from Roof Rack City, fitted etc, top job each time.
I've just got a cheap repco 3 bike towball carrier, it fits all shape frames, unless your frame has a smaller hole in the middle (eg. if you have a dually), then you'll need to get an attatchment for that