Just go with the v7. The SCPH-50000 series (v9 to v11) has got more problems with the laser.
You may be using too cheap discs if you can't get your console to read them... especially if you hear clicking noises. Use Verbatim DVD-R discs that were manufactured by Taiyo Yuden or Mitsubishi.
Burning your discs at a lower speed may not necessarily help with improving the quality of the burn, unless your burner has got some problems with burning reliably at higher speeds...
If you can get your hands on a network adaptor, just connect a ATA disk to it and use OPL to boot your games. That way, you will not only be saving your original discs, but your console's CD/DVD drive as well.
Oh, and I hope that this laser you got was meant for your console. If your console had a R-type laser (HD7 or KHS-400R), it needs either one of those two as a replacement. If it had a KHS-400B or KHS-400C, you should get a KHS-400C as a replacement.
If you got the wrong type of laser, you need to use the lenschanger program to manually set your console to use the new laser.
Last edited by SP193; 03-01-2013 at 07:48 AM.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS