Thanks for all the feedback.
It is good to know that a rough but flat surface is fine for gluing. That is what I thought, but I wanted to be sure.
In fact, should I purposely abrade the glassy surfaces for a better joint?
Regarding the Lie Nielsen planes... Yeah, they're expensive. I considered buying reconditioned 1930 era Stanley planes instead, but then I had visions of having problems with them and being frustrated.
I've bought a lot of tools these past ten years. Generally, you get what you pay for. The more expensive tools are easier to use and cost less long term. I can't tell you how many times I've had to pay twice because I bought something cheap the first time and ended up frustrated.
It was about a grand for the LN set. I would have spent half that on a decent lunch box planer. And I'd still have to build a jig for jointing. A large 12" jet combination planer/jointer would be ideal, but there is something truly expensive: well over a grand.
I'm not in this for volume production at the moment. I intend to make this workbench, then do some millwork for my old 1920s house (doors, windows, etc). After that, some furniture. I figured this set would offer me the flexibility I need to do just about any job I can imagine. Maybe not quickly, but I can at least get the job done with high quality results. I like the exercise too.
Once I'm familiar with these planes, I can always buy some antique Stanley planes, fix them up, and use those, selling the LN planes if I want.
This choice gave me the most flexibility for my budget (about a grand). I'm smarting a bit from the price, I think it's a practical choice, long term.