I skipped over most of the replies because I wanted to say I like idea #2. Why, you might ask? Well, it is because my workbench is sorta related to your bench.
I built it out of construction grade lumber and used a solid core door for the top. It has dog holes and Kreg Klamp tracks. The top is covered with Formica so the glue doesn't stick.
If you peruse my projects and threads I have started, you will see that workbench in a lot of those project pics.
A router on one end and Klamp Tracks on the other should make a very handy work bench you will get a lot of use out of. You can trust me on that. I have lost count on the number of face frames, doors and drawers I have built using that bench, clamps and tracks over the last few years.
Note: Check out the drawer on wheels I made to store clamps under the bench. You could build something like that to fit under your bench frame.
That's my story and I'm stickin' to it!