your at the same stage as i am parthiban,
I'm looking to upgrade my front speakers aswell, blew one up testing out my new headunit, I have been hunting around and found these below, looks like a good price, back when i was a youngster infinity was a good name in speakers
http://caraudiosecurity.com/shop/product/p...ts_id/3828.html
These are only 5 1/4", not 6 1/2", so mdf spacer would be required, and i dont have plans to put in amps later so watts is not too important for me.
maybe the guy's on here know something i dont about fitting a different size of speakers, but i think these would do the job.
And i do like a bargain - and not just because i'm a jock!!!!!!!