We had a (brief) look at Tegile to replace our aging Netapp (4 year old controller pair, and the oldest shelf dates back to 2009?), and while it was certainly impressive, the cost was... not. (the purchase cost was more than renewing the maintenance on said netapp by a good margin, and slightly less raw capacity.)
We ended up going to a nimble CS500 with a pair of the H90 expansion shelves; it was about 2/3rds the cost vs the renewal, a good deal more capacity, and easily the same performance figured as the netapp.
Anon to protect my paycheck.