From my perspective what I would be asking is.
what are you using it for?
what application profiles are you going to apply ?
how many hosts need to access the array ever?
fabric topology applied to the SAN?
what is the life span going to be?
does it need to be able to grow?
replication you say, syn or async?
distance to replicate and method to use, WDM san extension, distance, IP gateways?
what type of technology do you want, SAS, FC, SATA, SSD?
Best one, budget!
EVA4400 limited to eight shelves and 4 host ports
EMC, Storage processors are windows XP driven and require patching from new (some times)
IBM, living on past main frame success now living in past technologies
there is no one answer as it really does dfepend on what you want to use it for, they all have upsides as well.
I would love to help but need more info
I highly recommend the EMC CX4 platform. It’s a little on the expensive side, but it is a very high quality product. My second choice would then be the IBM platform.
I’ve heard good things about Compellent. We are considering them in addition to EMC for our next SAN.
If you have limited storage administration resources, the HP EVA4400 should move to the top of your list. WIth the built in virtualization capabilities, storage administrative tasks are really simplified. If you haven’t already seen it, here’s a link to paper that describes the ease of use in terms of costs savings: http://h20195.www2.hp.com/V2/GetPDF.aspx/4AA2-4661ENW.pdf.
If I’m not too late, I have a client that is needing to find a home for a brand new IBM DS8300 they took shipment of, pre-paid for 4 years of maintenance and decided they didn’t want it. IBM won’t take it back, so they’re stuck with it and are wanting to sell it crazy cheap. May be a bit larger than you require (around 115TB) but would definitely rate very high on the cost criteria.