Not knowing too much about the quality of the gear out there, but just looking at it from a cost standpoint... $1300 seems super cheap. If you factor out the cost of the class (the avg class in the los angeles area is about $400, usually inc 1 boat dive and 1 day shore dive), you are at $900 for alot of stuff. All that extra stuff after BC (knife, slate, bag, et al) has got to be at least $200 retail, no? I know alot of the packages I've seen are at least $1000, incl reg, bcd, octo, computer. Again, I am not well versed in the quality, but cost wise alone, it seems to be a no brainer. Esp if the class is included.
And it can't be good etiquette to try stuff on at the LDS and buy somewhere else.