Hi Dave; Although I can't speak much to the 24' Spree, as I don't own one. I have looked at them on the lot, just out of curiosity, and was fairly impressed. they look like a nice unit.
Regarding KZ, however, I can tell you that I have had very good experiences in dealing with them. I have been full time in one of their 5'ers, and very happy with the quality of the build, and any dealings I have had with their customer service.
I don't know where you are located, although I feel bad for that poor dog in your avatar... looks cold out there, but if you get down to Florida I can put you in touch with the dealer that sold me my unit.
'12 F-450 Lariat
05 KZ 45' Escalade Toy Hauler
00 Harley Road King, 94 Dyna Wide Glide, 83 FXR