I believe Eagle eyes is into the Remingtons. You might want to sent a PM for more info.
I'll get on board before the questions start flowing in. I own both the Remington 504 and the CZ 452 American. Both have their virtues. I'll list as per my personal experience.
CZ 452; Nice smooth action, quite accurate, but had to bed it to get it to shoot that way. Trigger as received is crap, and has no decent adjustment. Brooks kit solved that. Magazine is metal, but does protrude a bit out of the bottom metal. (more cosmetic than functional issue) Safety works in the opposite direction to most other rimfires out there (this I do not like) Fit and finish is OK, but not exceptional.( the checkering is well below good standards) My CZ does not have any special wood. Does not "feel" quite as good in the hands as the 504. I can recommend the CZ if you are willing to put up with the trigger, finish and safety as they are.
Remington 504; Action is very sturdy, and feels solid. Accuracy was about the same as the CZ as received, and I had hoped for a bit better since it has a match chamber. (apparently the 504 22LR sporter is a bit of a crapshoot as to barrels, since some shoot very well while others are not good at all. Mine would not shoot much under ½" at 50 with any ammo I tried, so guess it had a "middle of the road" barrel) Trigger is adjustable, and will go down low enough to satisfy most shooters. Very crisp. Magazine body is some type of alloy, but fits nice and flush on the bottom and feeds very well. Safety works in the correct direction. Fit and finish on mine was very good, and the checkering is superb. The wood itself is rather plain, but nice and dark, which makes it attractive. The 504 feels very nice in my hands, and points exceptionally well. I can recommend the 504 if you are willing to take the chance on getting a good barrel. (BTW, the HB version has not shown any accuracy issues like the sporter, nor has the 17HMR version) I bit the bullet on my own 504 and ordered up a Lilja EPS match barrel because I wanted the best accuracy possible. This is a true solution, but adds considerably to the cost of the rifle. This rifle now shoots in the .2's or under with several top quality ammos.
I am a Remington fan, but have tried to be as objective as possible in this evaluation, so an educated choice is easier for someone to make. Hope it helps. FWIW, I am a Rimfire junky, and own quite a number of them, including Remington 541's, 581's, Winchester 52's, Mossbergs, Sako, etc, etc. Regards, Eagleye.