New battery for rc18

[jnev]

I just finished rebuilding a brushless rc18t I bought from/traded a member here, and now I am in need of a battery. I am running lipo in my other 2 trucks so I might as well go lipo with this one to. Plus the decrease in weight, and more power is also a bonus.

So anyway, I would like to stick to a more known company and would like to stick to 2s. I am running the Mamba 6800 motor, so it won't be too insane, but should have plenty of power. I am also looking for the highest mah pack that could possible fit without any mods to the chassis. At the moment, the three highest mah packs I have found are these:
http://b-p-p.com/proddetail.php?prod=i_hyp1800_2s
and
http://b-p-p.com/proddetail.php?prod=g_hyp1500_2s
and
http://www.maxamps.com/Lipo-1550-74-Pack.htm

I know people here aren't the biggest fans of Max Amps packs, but I was thinking that their mini packs can't be too bad...

So what would you guys recommend between the three? And are there any others I should take a look at? Please keep the price in mind, as I would prefer to spend as little as possible.

Thanks for any help that can be offered.