IM, they are not getting anything they don't already have.
More 340's.
The plane in the Mel dep area was supposed to be a 340... but when the guy ordered it some time ago the supplier said 'you want the big one'? and so a model of the 2000 ended up in the lounge instead of a 340.
To answer your Q, what are they getting? 25 SAAB 340B+, not that there is anything wrong with that. The best gear for MOST of what REX does. Unfortunately it is all based on a Business model where pilot labour is a cheap.
But hey, if we don't group together then regional pilots will still be CHEAP!