Battery recommendations - Bang/Buck/Weight

[Jayhovah]

I think I've mortally wounded my stock battery over the holidays by draining it to near empty... After getting everything back up and running I went on a trip for 6 days and had to jumpstart the car when I got back. A new battery is likely in the near future for me.

I see some guys are running smaller power-sports types of batteries that are cheap. How is that going? Anything there that will hold a charge and still crank after a couple of weeks?

There are also some smaller lithium ion based batteries that can be had for not a lot more than a OEM autoparts store replacement... Any benefits to the Li-ion tech for a car battery? Perhaps comparable power at a lighter weight?

Any bang/buck sweetspot battery that many folks are using?

I figure I will end up just getting a OE-replacement...but wanted to make sure I wasn't missing an easy chance to shed some weight.