I actually bought the first TPB before I decided it'd be too much of a cash-sink. $19.99 for six issues, and they've only released four so far with the fifth coming out in October, so at that rate they'd have at least three more to go (assuming they plan one for Q Quarterly), and little room for the annuals. If you do go that route, I couldn't recommend it in good conscience unless you're getting them for some kind of discount.
Oh, and I forgot I have three more O'Neil-penned Vic-featuring issues to track down still. Azrael #10 (has Vic and Lady Shiva chatting in the audience at some fighting ring), Azrael Plus #1 (Plus The Question, that is) and Showcase '95 #3 (Rick Burchett art!). Long as I remember to keep 'em on the list.