My knee jerk recommendation would be another LG, but given your experience, it may not go so well. Try a LiteOn or Samsung; both are decent brands and typically produce good hardware. No specific model; most drives these days are pretty good at their job.
Or, if you wanted, you could get an external enclosure and get an Optiarc. Depending on what you could find, a 7200, 7240, 7260, or 7280 series drive (or 5200/5240/5260/5280 series drive) would be quite the nice replacement.
Just make sure to stay with a half-height drive for best performance; another slim drive like the internal drive would be of no benefit.
Oh: LiteOn switched to a generic drive name string back in 2009...or 2008. I forget which. After that, half height drives show up as ATAPI (model number), and slim drives identify as Slimtype (model number). Some brands may still request the drive ID string be changed to something even more generic, but the model numbers reported in the ID string generally vary enough that you can tell the original manufacturer.