I'm looking to replace the stock speakers in my '96 850 wagon with either Infinity or Boston Acoustics speakers. Can anyone tell me if the following speaker models will fit ok in my car? Also, what's your take on the best sound? My deck is the stock Volvo SC815 head unit. Since my Volvo stock speakers are 8ohm in dash, 8ohm in rear door, 4ohm in front door, 8ohm in rear wagon pillar... I figure I'd go 4ohm in both doors, keep the 8ohm tweeter in the rear pillars, and -disconnect- the dash speakers. Has anyone else tried this?

Anyway, please comment on my options below -- will the speakers fit without any mods to the doors and Volvo grilles?

Option #1:
==========
Boston Acoustics 4ohm NX67 (6.5") in rear doors
Boston Acoustics 4ohm NX57 (5.25") in front doors
Stock tweeter in rear pillars

Option #2:
==========
Infinity 4ohm Kappa 62.5i (6.5") in rear doors
Infinity 4ohm Kappa 52.5i (5.25") in front doors
Stock tweeter in rear pillars

Thanks!