i have the same set of speakers as you, i'm running 75watts to them and they seem to shine very well. i have a 4 channel amp (75watts x 4 @ 4 ohm) and rear speakers, but i'm getting rid of the rears soon, and when i do, well, i'm gonna have to utilize the 4 channel amp the best way i can, bridge it to the HEX's i'll be running 300watts a side when i bridge it, i'll let you know how it works out.
2005 Honda Accord EX Sedan
JL Audio Cleansweep, JL Audio ZR650-CSi, JL Audio 12W3v3 in custom stealthbox like enclosure in trunk, JL Audio A6450, Audiocontrol DQXS w/DDC
Sony 32" XBR BRAVIA LCD, Toshiba HD-A1 HD-DVD Player, B&W 704 Floorstanders, Rotel RC-1070 Pre amp, Rotel RB-1070 amplifier (130x2), Rotel RCC-1055 5 Disc Changer, HTPC as music server and PVR, and XBOX 360.