its really hard to say for sure, i loved my evo, the evo2 should have been the perfect machine, but i love the decent,
is it worth an extra £1k over a bianca, personally id say yes, you have so much more in terms of options, i hardly ever used the flow control of the bianca, i did use the v3 functions of low flow etc.
the decent has support and a userbase thats just un matched imo.