How much of a difference is there between these batteries?

[Lucky 76 5]

I was planning on buying 4 of the C&D High Rate 100 lb batteries for my car. They do something like 140 aH. I can get them for under $200 shipped each. I was looking into the d3100 batteries along with other batteries which are almost double the price. How much of a difference is there between the C&D batteries and say the d3100? Is it worth the extra $700 total I would have to spend? I am powering 4 of the saz1500s, 1 100.4, and 1 120.2. I have a 260 amp alternator. Let me know what you think.

[CrazyKenKid 64]

I have a buddy who is running 2 of those C&D huge @$$ 100lb batteries! I think the main reason (my own personal belief) that they can't sell them due to how much they weigh. SO they have to sell them cheaper than normal plus i think they are like 30% bigger than most other batteries also. so due there added size and weigh factor.

but my buddy swears by them as he thinks they are the best batteries around due to their huge ah and reserve!

[CrazyKenKid 64]

and i assume you are refering to the 540MR

http://www.cdstandbypower.com/product/battery/vrla/pdf/12_1029.pdf

[Lucky 76 5]

Na they are the 490. A little bit less ah.