I have got two swaps that I have to do.

1) The car is a 97 civic ex vtec. I believe the engine model is d16y8. motor went bad so I need to swap the motor for another one (same model). Should I take it to a shop or do it myself? my and my buddy were hoping it would be an easy in and out because its the same model, but before I do it, any suggestions or advice would be appriciated. And also do you know a good motor dealer to buy d series engines that offers a warranty with the motor?

2) The second is a B16a2 coming out of a 99 civic si going into my 97 dx. This one is the whole swap, tranny and all. Wondering how tough this one will be or if I should just take it to the local shop to do it (who is good at swaps).