Dude, dont really take seriously what others say.
The Four top clients that I've used and liked are BitComet, torrentopia, BitTornado and ABC.
I guess the best way to find out the best client for you would be to try out each for a week or so and see which one has features/Interface that you like and runs well on your system. Why I say that you should try them out yourself is because for some reason some clients perform better on some systems than others, an example is Azureus, it runs perfectly well on my friend's PC but when I run it on mine it slows down the system. However I've known BitComet to perform better on most sytems and not using too many resources hence system doesn't slack.
Also one client may have feature(s) that may be more handy to you than other clients so its best if you try them all out and decide. For example I personally Like ABC's web interface, meaning you can add/control your torrents over the web which is handy if you're away from the PC...and its easy to setup and use(BitComet also has it but it takes some basic coding to get it working)...
So Take these things in account:
1. System resource
2. Interface u r comfortable with
3. Better speeds.
I find Bit tornado 0.3.10 better