i just recently bought LE, and from what i can say so far there are a lot of great sounding kits in there.
i guess the SE might be even better (=more), but on a budget the LE will do just fine.
coming from addictive drums, i can only say that SSD SHITS all over AD. even the LE is way more versatile that AD could ever be.
it's also sooo easy to use....i program a lot of drum beats in guitar pro, and with SSD it's just drag n drop into your DAW. with AD you have to use a whole different drum map (why-the-fuck would anyone program a drum software like that?????), and converting thins has been a PITA for me.
get LE. you wont be disappointed.....if cash is not an issue i guess SE will be even better though.