I'd vote for the Brocock Compatto. (and I have a Marauder too)
It's shorter and more balanced than a rifle, but not so sure as to be a proper bullpup. (expensive) The Walther barrel is great, the Huggett moderator is great, the action is great and ergonomics are great. The only thing lacking is the looks, with its plastic stock.
This might be helpful to you: I just yesterday put up a review video of the Compatto, featuring the Marauder for comparison.
I've shot a couple Daystates (Regal XL and Airwolf MCT in .22) They're very nice, and the electronic trigger of the Airwolf is VERY light. I would call it a hair trigger. They shoot great and look great.
FX, I've shot one (Royale) and it was somewhat less reliable; prone to blowing out the breech O-ring.
If you bought the Compatto, you'd have money left over for a killer scope.
If you already have a scope earmarked for it,a Taipan Mutant in .25 would probably be my next choice, or a tuned Hatsan from bwalton. (bwaltonpcp.com, I think)
Let us know what you end up with.