From the get-go I've recommended the ASUS P8P67 DELUXE for most enthusiasts. I do NOT recommend either the H67 or Z68 'IF' using a Discrete GPU 1 or more; you'll loose physical RAM and share the PCIe bandwidth with the Discrete GPU.
Clearly, the H67 + 'K' CPU is a total waste; No OC and limited Turbo-boost. The H67 is fine for non-K CPUs and onboard VGA. The Z68 allows K OC, but again you're faced with the sharing as described above.
Therefore, Discrete GPU + K SB CPU leaves the P67. Next, it comes down to 'Options' and 'Needs' that you haven't listed.
SIMPLE CONFIG -> SABERTOOTH P67 or P8P67 PRO or P8P67 DELUXE or P8P67-M PRO
SIMPLE CONFIG / BT -> P8P67 PRO or P8P67 DELUXE
PCIe SSD -> P8P67 PRO or P8P67 DELUXE
RAID 0 SSD / PCIe SSD -> P8P67 DELUXE
LAN Party - > P8P67 DELUXE
To simplify, if the goal is a single GPU, SSD + HDD + ODD, OC or essentially as a basic but fast Desktop and I didn't need all the bells and whistles {BT/RAID 0 SSD/Dual LAN/CF or SLI} then I'd choose the P8P67-M PRO
http://usa.asus.com/product.aspx?P_ID=iT2FJPCMOGBHClu4
ASUS:
Maximus IV Extreme {2~3WAY, x8...x8, Marvell 9182 [ASUS typo? 9128] RAID 0/1, Dual Intel LAN, BT}
P8P67 WS Revolution {2~3WAY & 4-WAY Quadro only, x8...x8, Marvell 9128 RAID 0/1, Dual Intel LAN}
P8P67 DELUXE {2-WAY, x8/x8 + x4 open, Marvell 9128 RAID 0/1, Dual Intel/Realtek LAN, BT, eSATA, USB3 Ft Panel}
P8P67 EVO {2-WAY, x8/x8 + x4 open, Marvell 9120 no RAID, Dual Intel/Realtek LAN}
P8P67 PRO {2-WAY, x8/x8 + x4 open, Marvell 9120 no RAID, BT}
SABERTOOTH P67 {2-WAY, x8/x8, Marvell 9120 no RAID, eSATA}
P8P67 LE {cheap}
P8P67 {cheap}
P8P67-M {cheap}
P8P67-M PRO {cheap}
edit: Building Chart:
http://i1013.photobucket.com/albums/af254/Jaquith/Build_Chart_Q1-2011-1.jpg