Drop B

7 strings are fucking great. I personally have no problem with them.

Btw, I use...Ibanez Universe and Schechter Hellrasier C-7, for anyone interested ( my 7 string guitars only)
 
10-52 is not thick enough for B, especially not A. I am running 11-56 for D standard. I'd get 13-68 for B or A.

Depending on what pickups you have in the guitar now, you might want to upgrade. Some pickups, such as the DiMarzio D-Sonic and X2N, and EMGs in general are very good at low tunings while others ( especially cheap stock pickups ) can't handle the bass and get muddy. Of course, the sound might be fine. You won't know until you try it out.

Agreed, I wouldn't go pasted D with 52s. Then again I have several 7-strings, and that's the way to go in my opinion.

panzerfaust666 I too have a Hellraiser, I love it, I also have Ibanez RG 7 strings too.