Hogan?
Hogan has the advantage in name recognition, network, social media, and in the WaPo / Bsun polls. Pretty sure at this point he has more money than Craig too.
I liked Lollar at the beginning but he's made way too many rookie mistakes to win a gubernatorial election.
Craig is an ok choice, but I think his proposal to eliminate the income tax is too far out there for a Maryland general election. It'll appeal to primary voters, but it'll scare the dickens out of centrists in a general election.
Also, the GOP now has (at least one) republican candidate for Attorney General:
http://www.quintonreport.com/2014/02/24/breaking-news-md-gop-has-a-candidate-for-attorney-general/
Don't know much about him. I have been following the poop fight over Peroutka between RedMaryland and the rest of the GOP.
I have low expectations in MD. Frosh, Cardin, Brown, and Gansler need to be unemployed in 2015. My criteria is: has pulse, decent chance to win the general election. Anything else is a nice to have.
Lollar has the advantage of being...black, especially if running against a white candidate.
I have met Charles Lollar several times and a friend works on his campaign. He is a black conservative and stands no chance of winning the poor urban vote. If he had run as a democrat (think DINO) then he would have stood a much better chance.
Craig has been a disaster while serving as our Harford County Executive.