Yes there are other brands worth looking at. Thule stuff is great and my usual go-to brand for stuff like this. However when I went for a 4 bike tow bar carrier I just couldn’t justify spending on the Thule or similar. I don’t mind paying the premium for something like a roof rack that will be on permanently and I know from experience Thule will last whereas other cheaper alternatives don’t, but I don’t need that level of quality for a tow bar bike rack that will just be used occasionally, so didn’t want to pay the premium – with the cost of the tow bar I was looking at the thick end of £800.
roofbox.co.uk is a good link and I eventually went with the Buzzrack Quattro, which has been great. The only downside is its weight, but using it occasionally that’s not really an issue. In fact I think the basic design of the thing is better than the Thule and similar top of the range racks too and is alot more flexible in terms of how you can mount your bikes.
If you do think you might like to keep the rack installed for long lengths of time then take a look at Whitter. They do a 4 bike rack that can fold up vertically when you’ve not got bikes loaded onto it. It isn’t cheap, but if that is a feature you might like I don’t think i’ve seen it with any other manufacturers options.