After some research, I am changing my mind and inclined to use the 74HCT273 (*) as registers.

I need the Reset input and the 3 state output.

There will be:

• 4 chips for IR register (32 bits);
• 2 for PC (16 bits);
• 8 for general use registers (8 bits each).

So I'll need 14 of these guys., so far..

(*) Edit: It's not 74HCT273, the right IC is SN74ALS874BN, not very easy to find on stores, but will save many ICs, since it's the only with both Reset and 3-state outputs.