We had a lot of problem with our P2000, the performance just wasn't as we needed it to be, replacing wasn't an option.
We moved over to RAID10 and have been really happy with it, as everyone says, the issue is the cost/waste losing half your disks however I believe if you're looking to use VDI later it will be well worthwhile using RAID10.
If you budget can stretch to one more disk, you can configure this as a Global Spare giving you some peace of mind whilst you wait for HP to replace the disk.