: To sharpen a low angle block plane is it a good idea to purchase a honing
: guide and angle jig? The Veritas system costs around $33 in combo or I can
: get the guide separately for around $12. Do I need both?

I would get both. I have them and don't regret the purchase at all.

: Also, if I don't use the sandpaper and glass sharpening method, what grit
: waterstones would you suggest?

A 1000/4000 combination stone is a great deal. You might also want to get a coarser stone for rough cutting.