the liteon 24102B is an excellent drive and is inexpensive...it will burn at 24x on almost any media...the plex 2410 is very media picky and review indicate the plex 40cdrw is also...the speed difference is small between 32x, 40x and 24x....that is because the 24x...16-20-24.....most 32x 16-20-24-32(this speed not seen till like 40min on cdr)..40x ..20-24-32-40(this at 50 min I believe)
Best bang for the buck is liteon 24x..I had a 24x plex and got rid of it..love my liteon 24x