Don't buy the delta, it doesn't take chisels bigger than 1/2". The stupid chuck is too small to take the bigger bits for the bigger chisels even if you manage to make a new bushing to fit inside the delta. DAMHIKT. If you want to cut bigger mortises, get the shop fox. The price is almost the same and you get more hp and larger chisel capacity. I cut 10 3/4" mortises last weekend with a 3/8" chisel. Talk about annoying. The only difference is the fence, and I don't think that's really a dealbreaker, the fence on the delta is not all that. Ideally you need to have that front clamping mechanism you see on more expensive machines but a clamp around the fence and workpeice works too. I hope I've managed to convey my frustration at the delta machine. If I were doing it again, I'd buy the shop fox model.
Edit - I just saw a pic of the shop fox fence, it actually looks like it adjusts easier/finer.