Yeah I do admit when I read the feature notes about the remap and how arrays would shrink over time I was like EKKK!
But I've kind of got used to the idea now and I can see some sense in how they are doing it (rather then lots of individual drives doing there own thing when they feel like it and causing unpredictable performance the array simply handles it as it would any bad block).
The RAID6 thing also bothers me but I'm also worried about the drive sizes so they kind of balance out in my head, the performance impact is still an issue however the space side isn't because in 3PAR a RAID5 3:1 actually uses the same amount of parity space as a RAID6 6:2.
However these things are still a little tricky in small systems, I had to setup our first 8000s as RAID10 because there were too few drives to do anything else, luckily with software updates and cheap conversion to single license I've now managed to migrate them to RAID5. More space for free is always good.
But yes 3PAR is not cheap, the minimal 8200 system is a lot cheaper then some kit though but for pure cost we still run two other vendors, although I wouldn't want any of our critical systems on those.