Capital Grille is my favorite high end steakhouse, they have the consistency in service and food quality of Outback Steakhouse with justified prices for the quality of their steaks and decor. Very nice ambiance, very friendly staff, you can't go wrong if you don't mind opening up the wallet or pocket book for a solid dining experience.
My vodka martini's are always very smooth and my steaks are always cooked to perfection. I end up over eating because everything is so good that I reach a Zen-like state of "food enlightenment."
Also the bar area is great for dates to share a bottle of wine and order appetizers. My date knew the bartender who was extremely friendly and attentive and gave great wine recommendations.