Ran my BBS02 25A with a Samsung 29E 13S4P pack for a couple of years, before the pack showed dramatic signs of voltage sag. Now running a Samsung 30Q 13S4P pack and the difference is like night and day. IMHO the 30Q's are far better than the 29E's!
If you insist on a 29E pack, then definitely go for 5P or higher. 30Q's should be ok with 4P though.