Best 6.5" speakers I can get to be powered from Alpine head unit ?

[Inertia]

Since setting up my busienss and havign quite a lot of success I am branching out further and have sold my Audi to invest in myself, so I am going to be using my work car as my main car for at least the next 12 months.

In the past I have always gone all out on sound systems, using 2 sets of hight quality high RMS components (mids, tweets & crossovers) ran from a powerfull amplifier coupled with subs and amps. so I am not really up on powering speakers from head units, but I know the kind of components I used to run need an amp just to drive them.

I have took my Alpine CDE-9880R Head unit from the Audi and fited it to my work car (Vauxhall Astra Mk4 Estate) using the standard speakers and wiring, it sounds shockingly bad.

What I am asking is which speakers (2 pairs) should i replace the standard speakers with just using the existing wiring and no amplifiers or anything, to be powered from the head unit? I think these will have to be integrated speakers because the factory tweeters are located where you cant really replace them ?

I beleive the more sensative the speakers the better when it comes to running them straigth from the HU ?

I was considering 2 sets of ALPINE SXE 1725S but I'm not sure.

Thanks

[MR_Candyman]

Honestly, try them out in stores and see what you like. Everybody's ear is different.

[teriba]

Since most HUs put out about 10W per channel you won't ever get it sounding all that great.