Very nice rifle, I always liked the look of the full stock versions but find them difficult to source here in the UK.
I bought the "bigger brother" some time ago. It's the CZ527 Varmint with kevlar stock. It also has the 1:9" twist for .223. Mine shoots Radway Green surplus 5.56mm quite well (CZ have stated that 5.56mm is suitable for their .223 rifles) but shoots much better with handloads.
69gr SMK seem to shoot the best out of it. I use Reload Swiss RS50 stick powder which is similar to Vihtavuori N140. It also shoots 69gr Lapua Scenar's well, but not quite as good as SMK's. The 52gr SMK's also shoot nicely but I only use these at 100m shooting because the wind has too much effect for any further distance.
I used to have a rail on the rifle but no longer use it. It mounts directly onto the 16(?)mm rail and has a recoil lug that fits into the slot in the rear section of the receiver. I found that even when using low rings the scope was mounted way too high. I had to use a lot of elevation to get the scope on target at 100m due to the high distance from bore axis; I ended up with just 4mrad of elevation left over...
If you do go down the route of scope mounting, make sure you get high enough rings. Not because of the objective bell hitting the barrel, but because the bolt hits the eye piece. I used high Warne 30mm rings for the CZ receiver and have around 2-3mm clearance between the bolt and the eye piece as shown in the second image.
Hope you have great fun with your rifle OP!