What car and type of bars are you planning on using? Thule offer a very wide range of bars (but personally I'd save the cash and use the square profiled bars as the Aero's don't seem to offer any benefits – I've used both). In terms of racks – what kind of bike do you have? If the frame fits, then again Thule make some great racks – not cheap but seem to be reliable.
If the frame is awkward you can get fork-mounted solutions that will hold the bike – Pendle (at present) are the only company offering a 15mmQR solution – I've got that and it's great.
What do you want out your rack? Ultimate security or are you willing to give some of that up for speed of install? Thule is very quick to put on (but also very quick to remove – the locks work but I'm not convinced how strong they are – not had one fail on me so it might just be in my head).
Loads of options but what price are you looking at? What kind of bike(s) are you planning on carrying? Just your bike(s) or a multitude of bikes – if just your own then you can narrow the search down to a few that work best for them but if a multitude you need to cater for more options.