Peter Hamilton has to be up there. I'm currently reading through his Commonwealth Saga and loving it. His books are quite lengthy, but remarkably entertaining throughout.
Richard Morgan's Takeshi Kovacs trilogy (starts with Altered Carbon) is a must-read. It starts strong and gets even better, I think.
Finally, I totally nerd out over John G. Hemry's Lost Fleet series. It has some flaws, but epic fleet battles and a solid main storyline more than make up for it.
just started the commonwealth
I'm not really digging it though 100 pages in
worth sticking through?