I completely agree with 'jaysp' on the statement "Rex will completely mask qazi's voice. He has a far deeper voice whereas Qazi voice is very soft. Qazi maynot be completely confident of his singing skills. The best thing for Qazi would be to be FJ with RR because if he becomes FJ with Rex, Rex will completely takeover once they become FJ". That was very analytical and in-depth thought.
And also agree with MS ATTITUDE for the statement ".... cuz agr rex agay qazi k sath tu wo qazi k sath back stabbing zaror kare gaaa hippo kahin ka" LOL the last one was a cute statement.
We must not forget that Qazi does not flare in a group song. He always seem to be shaded by his fellow contenders while singing. But when he is performing alone, he does well. However this seem not true with RR, his voice seem to come out strongly along RR's voice. So with RR, Qazi has more chances to flare up his singing talent.
The cause for Qazi wanting a Jodi with Rex is his 'bachpana'. Do you realize the times when we would like to select colleges or institutions where we have got our fun friends - just because we could gel well and do masti as well as study. We feel afraid of having to have friends whom we're not comfortable with. This is the exact case with Qazi. He's not mature and he's taking things lightly - thats why ranting on having Rex as his jodi. If by some bad luck, he gets his wish fulfilled and Rex becomes his Jodi, then Qazi will surely repent. Because, as others said, Rex will surely overshadow Qazi. Qazi will go on fooling around and doing masti while singing and Rex will take the opportunity to grab meaty projects on singing. He's very very sly - keep this in mind. He doesn't look half what he's from inside.