Hard Drive options for Series 2 (Toshiba RS-TX20)?

It seems it's time to replace the HD in my Series 2 TiVo (Toshiba RS-TX20). A few years ago, I replaced the stock HD with a 750GB Seagate DB35. However lately I'm getting picture freezes, and a scan with SeaTools shows some bad sectors.



I have a PATA/SATA converter, so I'm all set there. I just need some HD recommendations. I don't need a lot of storage, since this is just a secondary unit, so anything 750GB to 1TB should be fine.



Looking at Western Digital's website for AV drives, I see:



WD7500AURS | SATA 3 Gb/s | 750 GB



WD10EURX | SATA 6 Gb/s | 1 TB



WD10EURS | SATA 3 Gb/s | 1 TB



There is also a "surveillance" drive listed:



WD10PURX | SATA 6 Gb/s | 1 TB



Looking on newegg.com as an example, the WD7500AURS and WD10EURS aren't found. The WD10EURX is available, but the description says that the WD10PURX is the newer model of that drive.



So is the WD10PURX the model I should go with? I searched in tivocommunity.com forums for that model, but got no hits, so that makes me think it may not be a viable option.



Thanks for any help folks can provide.