We can tell you a whole bunch of speakers that may fit the bill, however all I can say is that every person has different hearing, and what might sound good to me doesn't to you.
Therefore, head into your nearest specialised car audio dealer and audition as many speakers as you can. Take a CD or USB with the type of music you listen to you and see what you like.
In regards to splits though, try and steer clear of splits that do not have a crossover. They don't have the same quality as those with an inline crossover.
Also, forget rear speakers. They are an unnecessary waste of money. Keep the stock rears, cut the bass from them and they are loud enough. Spend the money you are saving by not buying rears on better quality fronts, you won't be dissapointed

[New: MY11 FPV F6 | Winter White | Pioneer DEX-P99RS | Alpine PDX-F6 | Alpine PDX-M12 | JL Audio 12W7-AE ]
[Old: MY07 2.0R | Urban Grey | 5 MT | 6000k HID | LED | Alpine IVA-W502E | Alpine PDX1.1000 | Alpine PDX4.150 | JL Audio 12W7v3 | Focal KRX2 ]