I noticed that the last linux distro you used was rh6! Things are not like that anymore.. unless you want that!
I use Puppy Linux on my inspiron 7500, and it works really well. Depending on specs cpu/Ram/Hdd space, you can go with DSL on the lower spec end, and Debian/Ubuntu/Slack/all the Biggies, on the higher spec end.
Good luck, and get yerself some Live CD's