Roster and salary cap

With the addition of two bigs and the departure of two smalls with the lower than expected salary cap I have no idea where we stand. I think we have 2 open spots and 2 exceptions. No idea how much we can spend? If Denver can't make Valanciunas work is there any remote possibility we can get him? Do we sign two 2 way guys? I'm thrilled with the draft and the moves but I'm very confused....