Need help with bookshelf speaker choices. . .

Looking for suggestions on a good (economical) set of bookshelf speakers to use with a Dared VP-16 integrated tube amp (10-12WPC) that I just picked up. I KNOW the Dared products are not considered the "best", but this is my first foray into tubes. My biggest concerns are 1) best overall sound for dollar (<$500/pr) and 2) are the suggested speakers efficient enough for the power I have. Some speakers that may be under consideration are the Paradigm Studio 20's or 40's, Klipsch, etc. Also, how about the Tube Audio Design (TAD) 803's? Can I get away without a sub with any of the above or other suggestions? Thanks in advance for your opinion(s).