Jordan,
I upgraded from a samsung bdp2500 blu ray to a pioneer lx-52 and noticed quite a large difference.
Everything from colours, to motion handling and audio quality were improved in varying amounts. However on a smaller screen this defference may not be as noticable.
I dont think you would be dissapointed in upgrading but dont expect chalk and cheese. the blu ray you have is a good one to start with albeit a little older.