I have experience with the cncshark from rockler. I bought one 4 months ago.
It does a good job of recieveing the job, and running it without fail.
The only downside to it is a lack of rigidity in the table that is made of mdf.
I ended up making a tooling plate and redesigning the bottom gantry with a super stiff crossbar that has fixed this problem.
As my orders for product have increased, I am being hit with requests for larger designs than the shark can produce and having to turn them down.
I am looking into a larger machine. I would be willing to discuss a sale to you if you are interested in this one. It is the cncshark pro with the 24x24 size...will actually cut closer to 25 inches. It came with v-carve pro and that would be included. <I already own Aspire and don't use V-carve>
PM me if you are interested.