Prices made me change my mind. People want a lot of money even for 2nd hand studiologics, i haven't seen a new one in the stores i've looked at. (There is no online music instruments store here like sweetwater, zzsounds etc and international sites don't send here because of the problems at customs) Also i couldn't find the distributor of studiologic here and there is a wild price difference of the same keyboard here if you buy it from it's distributor or other stores. CME distributor told me they don't have 88key controllers (i know CME itself have but distributor don't bring it only for special requests) and offered me M-Audio Keystation Pro 88 with a price a lot higher than the price actual distributor of the M-Audio gave me. I didn't exaggerate when i said it was like a joke
Anyway as a result, i said myself if i'll pay 1000$+ price range it's a wiser decision to buy a roland even if it has on board sounds because i tried it and liked it at the store.
I can rearrange the samples in my sampler according to velocitiy range of the keyboard that's won't be a big problem but i didn't try the midi connection via usb yet i connected and installed drivers correctly but i can't see the device in midi channels list.
Edit: I fixed the problem, it works now, i can achieve 127 velocity. it is hard to achive in normal touch setting and more achievable in light touch setting.